Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd1a8ed7e077b49…

MALICIOUS

PDF

51.8 KB Created: 2020-08-02 16:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7ffbd81fbc67a37137568e3e2824f1e SHA-1: 6f4c529ee0f2b2f2a1cbc5421122038376476982 SHA-256: 8fd1a8ed7e077b4993773aad1fa5ab11a85012f829c8f07d59fe954dd5ab1cbe
234 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a redirector service. The redirector URL is https://ttraff.ru/pify?keyword=curl+send+json. Another heuristic indicates visible command execution instructions, suggesting the potential for LOLBins to be used. The document body contains obfuscated text but also includes the redirector URL and several Shopify-hosted PDF links, one of which is https://cdn.shopify.com/s/files/1/0436/0214/9540/files/principles_of_econometrics_3rd_edition.pdf. The primary attack pattern appears to be a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=curl+send+json In PDF document text
    • http://files.ellisandassoc.com/uploads/1/3/1/4/131454560/xokawa.pdfIn PDF document text
    • http://files.alexandradecandia.com/uploads/1/3/2/6/132695629/dofux_sotarum_rojeba.pdfIn PDF document text
    • http://ruzaxutoj.tonguetanglingtales.com/uploads/1/3/0/8/130874064/5682345.pdfIn PDF document text
    • http://files.adurtreesurgeon.com/uploads/1/3/1/6/131636891/46f5f59eb2cf6f8.pdfIn PDF document text
    • http://files.marinerscoveneighborhood.com/uploads/1/3/1/3/131379730/lepajifotag-foburad-tanosarodeso-tivetetikisa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0214/9540/files/principles_of_econometrics_3rd_edition.pdfIn macro / runtime command snippet
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/dabarepesotilikanowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86593634255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/11428389806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0818/6792/files/fejipurixok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1397/9812/files/dinifilonamaweruzefudave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/bofijapuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/57617255139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/99603431224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/9888155010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/57755110629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/zamitomisikawipu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6866 4464 bytes
SHA-256: c7f8d7ba7866f22469a4f42aa752fee9e689688586df0b24186a8aacb852870f
font_01_sfnt_off0000779b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779B 11484 bytes
SHA-256: 55fbd964f769485563f0068da86d117459e5f1b862d03392fffddd554e9f361a
font_02_sfnt_off00009e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E51 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15
font_03_sfnt_off0000b3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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