Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0793e49e43f22f…

MALICIOUS

PDF

45.5 KB Created: 2020-08-20 02:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 447a67e2f1f7dae96f9038520bc66437 SHA-1: f554fbdde88ce0a24a08b15b9f04dcdbc7584a28 SHA-256: 4f0793e49e43f22ffc2b82653af5e578963442aa6901eb960580857d62e82bd5
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used in conjunction with the lure 'fiitjee lucknow answer key'. The document body, though heavily corrupted, also contains this URL and other PDF links. The primary attack pattern involves luring users through a deceptive document title to a malicious redirector.

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=fiitjee+lucknow+answer+key In PDF document text
    • http://files.cementpros.ca/uploads/1/3/0/8/130813988/1835f.pdfIn PDF document text
    • http://files.fchseagleband.com/uploads/1/3/0/7/130739073/3dd50.pdfIn PDF document text
    • http://files.salinaseminarseries.com/uploads/1/3/2/3/132303226/15439c548129c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/command_and_conquer_generals_cd_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/diraruminitura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/2644340673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/dionysius_the_areopagite_theologia_mystica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/65995387783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/4165772315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5349/0074/files/capitalismo_concorrencial_e_monopolista.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.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 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D88 5080 bytes
SHA-256: b14b187c3c13d702e1ea6f30cd89dca5c48d4916ab723522b7be3b8ba9545177
font_01_sfnt_off00006efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFC 10324 bytes
SHA-256: a412633fbe5d2eda2986a8c57ad8a0140cfd09186b1492c6e3ca23e882b09064
font_02_sfnt_off0000928c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928C 6800 bytes
SHA-256: 6c1612e668e532665ceafdcc38ae292478546bbe1098c27f3f131710edb92b8b

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