Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7680f164651f86e…

MALICIOUS

PDF

46.1 KB Created: 2020-07-30 14:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e6a3983b178fe7bcfa4fb33bca1b6f3 SHA-1: 802ce991f8031b48e6fb8b46ec187a3015c4c077 SHA-256: c7680f164651f86ea325cb83090c44c308f64bd94db774616ce620544d00927b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'chemistry book for class 11', suggesting a lure. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. The presence of a large number of SEO-optimized PDF links on Shopify domains indicates a link farm used to 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/pify?keyword=chemistry+book+for+class+11+sindh+textbook+board+pdf In PDF document text
    • http://files.cumberlandhabitat.org/uploads/1/3/1/0/131070356/ruvupekuzinixotoji.pdfIn PDF document text
    • http://files.castlewoodclays.com/uploads/1/3/0/8/130873907/b18a71fa7bc6.pdfIn PDF document text
    • http://files.almosthomecaninerescue.com/uploads/1/3/1/4/131453267/63448b4ff.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/1/0437/8358/5953/files/59857307434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6010/9210/files/jufofevunez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/wenuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/44725475366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4958/1730/files/34113908793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/zawagasolupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/mobekibolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/fujorifamokizosonurukoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejotoxirebogoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/sejasotapuguzomomopume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/kofujesudobinefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/mipusilisefubotomosu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00005b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B10 5632 bytes
SHA-256: a5b4c2d414e1556d991b239b0545421c9f81250dfb4b315dcc26bca181cb1893
font_01_sfnt_off00006e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E16 9728 bytes
SHA-256: 02a030a1ad18da9d6faee914d7890a2170b33560399256e3d892ed6c920d2f71
font_02_sfnt_off00008f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9A 17844 bytes
SHA-256: 0f48a34beea1fc4e85d70c2ff7abeb2bdcbc99ad0512cc423888b130d5dd2cc6

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