Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf471422fe47f53…

MALICIOUS

PDF

49.0 KB Created: 2020-08-06 02:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1c1e0d4322690bda318809d2cd9039f SHA-1: c54965b80a18b0e8e458a0a71b560bf9a94c7dcb SHA-256: 7bf471422fe47f53a589058ee6aa5b65d8121cc8f47c43ff5d9d89e0d49a1ecc
194 Risk Score

Malware Insights

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

This PDF file contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL and a list of other URLs, suggesting a link farm or phishing lure. The ML classifier strongly indicates maliciousness, and the presence of redirector links points towards an attempt to lead the user to malicious content or a phishing site.

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=chronic+stable+angina+pdf In PDF document text
    • http://files.srilankaatours.com/uploads/1/3/1/4/131453733/6392258.pdfIn PDF document text
    • http://files.foxsmama.ca/uploads/1/3/1/4/131437074/buzejezaxez.pdfIn PDF document text
    • http://files.biblebaptistchristianschool.com/uploads/1/3/1/3/131398504/2498410.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/67743155626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/pokemon_showdown_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/godoziniru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/25070363958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9057/0405/files/toro_wheelhorse_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6236/1245/files/pipamozesowebobiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0120/8232/files/30093721237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/40539099314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/ford_4500_backhoe_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/the_sound_and_the_fury_characters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43127542751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/gabexukekawixoxokel.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B9 5368 bytes
SHA-256: 996eeb1c0edc945c996f8de0cce755b813f581d4343f341a43dbf16898a547e1
font_01_sfnt_off000084e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E6 10948 bytes
SHA-256: 7f4827ee3eb3c118ac1cf49304907cd7105337f9926bdfd0dd2be4019ab53e44
font_02_sfnt_off0000a94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA94B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f