Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8dfef5aa909f3c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-25 11:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9057a80fa123b37f403533208bd81b7d SHA-1: 5fba08d410bd28e5095a4ad94cc92cc451f246f0 SHA-256: ce8dfef5aa909f3cab12bb6dcb2af9b88b99e911d0fee48b294ff0e75d5df8f0
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=birthday+invitation+cards+templates+word'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute malicious content or SEO spam. The presence of a 'download button' heuristic further supports the lure mechanism. No scripts were extracted, but the document body and heuristics strongly indicate a phishing or redirection 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=birthday+invitation+cards+templates+word In PDF document text
    • http://files.santebarleyphils.com/uploads/1/3/1/4/131438453/5ae6d81b9.pdfIn PDF document text
    • http://files.tomdeprisco.com/uploads/1/3/0/8/130874110/mofamunadomuk.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/1/0431/4837/8274/files/femaxozubibepawikedidiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/anti_cheat_counter_strike_1._6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/epilepsy_causes_and_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8178/4726/files/72814466012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/level_32_answer_escape_room.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/whirlpool_gold_dishwasher_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/dnd_fighter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/walexexorig.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B46 5616 bytes
SHA-256: 5f7c67e5a4769eb4463bfe3876b9aed558d13caf01fb7ed9c4066307a899b1f2
font_01_sfnt_off00007e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4E 9920 bytes
SHA-256: c5b167997db82cb3280df3410c911cfbeb346c285334f6012e6e1f384bf9fde2