Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c8be00b8eeac94…

MALICIOUS

PDF

44.3 KB Created: 2020-08-25 09:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 877dace8174479c83d089adfb53b74dd SHA-1: 35f13464b7a738ef42c0f58ccdb267cca3798598 SHA-256: 33c8be00b8eeac944b6494ec65c090420ea667d423bb96c178ad9d1d4cdf4043
234 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is presented as a chess puzzle app advertisement. The document also exhibits characteristics of a password-protected archive lure, suggesting it's a delivery mechanism for further malicious content. The embedded URLs and the document body content reinforce the social engineering aspect of this attack.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=chess+puzzles+apps+for+android In PDF document text
    • http://files.mormonwomenshistoryinitiative.org/uploads/1/3/1/4/131406068/gudepale-junema-nanuze-bixef.pdfIn PDF document text
    • http://files.allinonerenovationsllc.com/uploads/1/3/1/3/131398423/toxof_lorozuzezitone.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/1/0435/9025/4749/files/20103640353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2868/3674/files/tinkle_magazine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/53459282981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4518/0824/files/lebetelexevevom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/zegegofumajimubiwen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/shapeless_with_a_root_of_a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685258811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/nopenapedukagafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2347/3560/files/wuvunedozupijid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2887/files/suzipovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4191/2997/files/zebunawizan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/62236345707.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 6

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_off00007041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7041 5084 bytes
SHA-256: 0fbc562d97211281df7446a928f939614622581d815500d0945870362ec65648
font_01_sfnt_off0000818c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818C 10292 bytes
SHA-256: bd8f42db9d65da885da1f39d8f72df64a9132f050fe49fc2c8db1135832c8763

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