Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cfc809c7d9a021…

MALICIOUS

PDF

68.4 KB Created: 2020-08-14 23:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54e5756aaa9c22208fab80f83b46c94b SHA-1: d849d58d92b9a98688eac31d05b2c8c6df88820c SHA-256: d3cfc809c7d9a021692a9ca3d87ec3c0fa2f7d544b06bf8de8d1f5781d9dbb58
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users into clicking through to further malicious content. The document body also contains this URL, suggesting it is the primary lure. The presence of numerous other links to Shopify-hosted PDFs, while some are benign, indicates a link farm strategy to improve SEO and potentially distribute malicious content.

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=verbal%20reasoning%20true%20false%20cannot%20say%20pdf In PDF document text
    • http://files.womenspeakup.org/uploads/1/3/0/7/130775109/zodowopixikem.pdfIn PDF document text
    • http://files.reformationocconference.com/uploads/1/3/1/6/131637529/kewifexakasawizufu.pdfIn PDF document text
    • http://nudawuli.dodici-azpadu.com/uploads/1/3/0/7/130776228/9540638.pdfIn PDF document text
    • http://files.pics4ulimited.com/uploads/1/3/1/4/131436978/komowo.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/1/0428/5107/4214/files/lamijetesesuvinevoniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3297/3205/files/10113677759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/sublime_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/carboxylic_acid_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/adelaide_metro_train_timetable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/bitencourt_direito_penal_parte_especial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/popusamojojakal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8506/1541/files/tosubiluzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/87956606485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/css_grid_template_responsive.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 2

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_off0000ceb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB0 5528 bytes
SHA-256: 0c3e1eab58a0720efa9cd2b3cac489ad39db0752d11ed63e5bfa0ee13c5595f2
font_01_sfnt_off0000e18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 10304 bytes
SHA-256: 1cd46b04feaa3fbea582ac96053fece8e8e71d5d02b43d243acfb7441ad649f0

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