Malicious PDF — malware analysis report

Static analysis result for SHA-256 423337dab18640a8…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 04:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69735b93eff180ccf8dc72c948d95b95 SHA-1: 769f68e490f37f0a835531418714c56ba8b83eb6 SHA-256: 423337dab18640a8f7597e56b4c6d32cfec0c9c9553bf1cfb790543dc6d26417
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Toefl ibt sample reading test pdf' and the malicious URL, suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to obscure malicious redirects.

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=toefl+ibt+sample+reading+test+pdf In PDF document text
    • http://jabowal.gillespiecoalmuseum.org/uploads/1/3/1/6/131636725/b7d394b1c0996e.pdfIn PDF document text
    • http://files.zara-ahmad.com/uploads/1/3/1/8/131858540/6652614.pdfIn PDF document text
    • http://files.myfiorella.com/uploads/1/3/1/6/131637311/2586649.pdfIn PDF document text
    • http://files.thediscouragedfeminist.com/uploads/1/3/1/3/131398428/80511444b.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/1/0435/6967/6451/files/57909510340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/xukej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9453/1493/files/beruroto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/70657991911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2344/0799/files/vaxozelet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5325/9679/files/40524033535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/voxufofovuxibutivogitivov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5586/4213/files/xusewek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/79451305561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/calculus_10th_edition_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2306/4488/files/44297677399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8596/3169/files/nadanoxokesekut.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 7

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_off00006967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6967 5452 bytes
SHA-256: c631cee7c3a5213b8251a0ee6f5815c96718fa2dc60ec5f87b4bc249856661ae
font_01_sfnt_off00007bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCD 10176 bytes
SHA-256: 2ed3784888778c50e0acd4ffbb38222b8df02bb6024ba147cbe38ddec99886bd

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