Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4f15465d5b8ebf…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 23:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1881a209788398e0a6332a5b75d5fb6 SHA-1: 292c9905a3c2bf391020bbf5278a3947df7aeffe SHA-256: ba4f15465d5b8ebf142b1622f21897eeebbb48b33eaf1737269a56e88e7ed413
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link to 'ttraff.ru', which is flagged as a malicious redirector. The document body, though partially corrupted, includes the same URL and a title suggesting a lure for users seeking information on PDF forms. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=how%20to%20fill%20out%20a%20pdf%20form%20on%20my%20mac In PDF document text
    • http://fijedurep.apneaodyssey.com/uploads/1/3/1/4/131438641/1933430.pdfIn PDF document text
    • http://files.whitecoatantidote.org/uploads/1/3/1/0/131070604/tupamumizixow_jexuvij_xoromodatowuwe_xawetoneg.pdfIn PDF document text
    • http://tozunuk.masterhomeloan.co.nz/uploads/1/3/1/8/131856772/ba7406a.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/1/0434/7337/1300/files/64032430718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/pupogetimig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/autotask_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/15398608353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8131/0101/files/kejifoxopelokegajibuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2348/2535/files/manuale_apicoltore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/43934096761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/diloloviladareledazozap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/strauss_partial_differential_equations_solutions_manual.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_off00006216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 5280 bytes
SHA-256: 8a9e0bab46cc10b4049e4ddd39966602e45b03c0596b6badf656feb8e36d93d0
font_01_sfnt_off00007411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7411 10332 bytes
SHA-256: 2fa311683371846bfeaa493e44f98efa4351857c90d6c05d1ece61b4ce583173

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