Malicious PDF — malware analysis report

Static analysis result for SHA-256 81add0e23e7f0024…

MALICIOUS

PDF

43.5 KB Created: 2020-08-05 06:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f5282caef5d683c0ba44bbfba0566a3 SHA-1: 616cf64ed6786808d7cbfcdefdf31686f9354537 SHA-256: 81add0e23e7f0024d4e4b425ba9a118d56f60ec00d2648c2a73ff1f294c53061
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links designed to appear as legitimate downloads, but they redirect to a malicious SEO link farm. The primary redirector URL is https://ttraff.ru/pify?keyword=difference+between+meiosis+and+mitosis+pdf, which is associated with malicious activity. The document body, though heavily obfuscated, contains references to this redirector and other Shopify-hosted PDF files, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=difference+between+meiosis+and+mitosis+pdf In PDF document text
    • http://files.thedandyhorses.com/uploads/1/3/0/7/130775027/b902199e.pdfIn PDF document text
    • http://files.mywhiteprivilege.org/uploads/1/3/0/9/130969731/6c005b62ba.pdfIn PDF document text
    • http://files.stellasartgallery.com/uploads/1/3/2/6/132681586/78ea9629d31.pdfIn PDF document text
    • http://files.waggonerguidebooks.com/uploads/1/3/2/8/132814906/fanirowibugusisig.pdfIn PDF document text
    • http://files.vapee-scapeks.com/uploads/1/3/1/6/131606603/rakewew_totupimajaf_dorumuxezolemiv_gavejuvepol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9577/7699/files/banoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0127/2729/files/41946323687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/77628155762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/17245313312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/tojomakubelaref.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/rixabowakovixuroninetar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/case_study_examples_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/poropopexabawabiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/1748596334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3946/4341/files/zosabidivuketiler.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE1 5500 bytes
SHA-256: b9b899e734072016365cd444f356fb796feec392bc5a0201b0a334b3b558eb55
font_01_sfnt_off00007d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D96 10228 bytes
SHA-256: 5570e8e0937662f3d8537cb82bbca0e67950e412b4bb138a833fbf34af408742

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