Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb3038158ce0ef5…

MALICIOUS

PDF

32.1 KB Created: 2020-08-13 10:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7acb8857e01ceed83ef4ed7b4103b034 SHA-1: 26f9d5b539dce08bc8c81d434b3f9e90b360e7f2 SHA-256: 6cb3038158ce0ef5956db5d55d486c38fe868bedaf49758f3b247ca372f55ce1
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The embedded URLs are likely intended to trick users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/wb?keyword=hp%20laserjet%20mfp%20m130fw%20manual
    • http://files.alexandrakcooper.com/uploads/1/3/1/6/131607029/cc4181a2.pdf
    • http://files.loudounlyricopera.com/uploads/1/3/2/6/132695472/91844e.pdf
    • http://files.cbd-uk.shop/uploads/1/3/1/3/131379510/d566428890649.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6548/3168/files/dibibebudizulerunaneka.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6549/files/luzojobufujakiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0103/files/sufufixizakatogazikuwiba.pdf
    • https://cdn.shopify.com/s/files/1/0430/8680/7201/files/bowekikifogexunifen.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1517/files/34451369283.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/zifejovibitasatogifoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4803/3689/files/6438860929.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/runerawalekikotusade.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/94081681542.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sekokejeninidifowabofu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/possessive_nouns_worksheets_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/ceroplastes_floridensis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004215.bin
f5b7d2bee5f38f49b4eb91ef4100bb4b9549c7679cdbff4378372829d27a0edf
pdf-font-stream PDF embedded font (sfnt) at offset 0x4215 5536 bytes
font_01_sfnt_off000054e1.bin
92ec59c7d1acb1e915c843f901ef7680cbf52b7909f25dc7df6da096d75f36fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x54E1 9004 bytes