Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e685c3207adfd0…

MALICIOUS

PDF

44.5 KB Created: 2020-09-17 05:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7467a316d7022f0253d4c2c72a8df61 SHA-1: 2f73340367002fd1a7fa4fc7bc472fcd4c805bf3 SHA-256: 83e685c3207adfd0f2a5690e0c1d89ad10f35a1d3eadeb86676c979d0a8c2099
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.club/wix?keyword=sith+raid+phase+1+teams+no+jtr'. It also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDF files, some of which are hosted on potentially compromised domains. The document body, though heavily obfuscated, contains the same malicious URL and several other suspicious PDF URLs, suggesting an attempt to drive traffic to malicious content.

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.club/wix?keyword=sith+raid+phase+1+teams+no+jtr
    • http://files.coreducate.com/uploads/1/3/1/6/131637362/c22fa8.pdf
    • http://files.ktcreatedesign.com/uploads/1/3/0/8/130813796/6492392.pdf
    • http://files.deckbuildersabilene.com/uploads/1/3/1/6/131606198/nokadozamilapobu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/medgar_evers_home_health.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/20825781729.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/17023295702.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/xuginawiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1443/files/20125366672.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/figurative_language_worksheets_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/child_development_and_pedagogy_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1077/files/82022214954.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/wagugekodofajelegubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/breville_smoking_gun_manual.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_off00006f3b.bin
7fe2bb5137a81ff11ddefd688733b239e6e362358fca27ff3186f62a520ff3b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 5396 bytes
font_01_sfnt_off0000816f.bin
2251517e0129041fe8b026063cb7bd05384dc5b34b8590bc8c8c6216a1f1014c
pdf-font-stream PDF embedded font (sfnt) at offset 0x816F 10580 bytes