Malicious PDF — malware analysis report

Static analysis result for SHA-256 140a2c9e4c4e9b71…

MALICIOUS

PDF

62.3 KB Created: 2020-07-30 22:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fdf56625967ba0b60c41efe7dee1dbb4 SHA-1: f07485d1d8d84ebb0a07cc4d65c0b7f2b4f5d33f SHA-256: 140a2c9e4c4e9b712114456651f297f4334d549270c3f8696307e76208ddc4ee
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links pointing to redirector infrastructure, specifically `ttraff.com`, which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to educational materials to entice users to click on these links. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic.

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.com/pify?keyword=binomial+distribution+questions+and+solutions+pdf In PDF document text
    • http://files.meladyluna.com/uploads/1/3/1/4/131406286/5867674.pdfIn PDF document text
    • http://files.thesecretbrowclub.com/uploads/1/3/1/0/131071114/da838a.pdfIn PDF document text
    • http://files.firstclasssuccess.com/uploads/1/3/0/8/130874055/07e619.pdfIn PDF document text
    • http://files.juderoseaccountancy.com/uploads/1/3/1/0/131070841/vuvugedon.pdfIn PDF document text
    • http://files.the-psi.org/uploads/1/3/0/8/130874477/b2849c65c76b.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/1/0432/3488/5792/files/25717715478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/juvetixodogije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9086/0437/files/dipogepuxetobeseverib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8043/4342/files/mirafipomupifavevej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/8277750531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8524/2275/files/84926363400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/52905364252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/83866526848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/gevetapelukabitafosutoruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/55549898715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/45718279268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/kegifawuwaxofenob.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 8

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_off0000a817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA817 5384 bytes
SHA-256: f0c2e006afcc7f1e1eb638a03a254634ceabded286171d4c4f40ab40b64accd6
font_01_sfnt_off0000ba33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA33 15608 bytes
SHA-256: 01adc6cb42cb9ba0d8f406b3fc6f76a59546ce6b1a2fc4b20ae8dc73a085da31

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