Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bc2f52395ac0a6…

MALICIOUS

PDF

42.3 KB Created: 2020-08-16 13:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 440859160e85219e7d6d638f5e9df99e SHA-1: 5d797fa97a6e081d6b1f61c5ccea9828ca1dabc9 SHA-256: 01bc2f52395ac0a6f4b035f4694e40a762f5b022d0c9bbf6d2189374338cb56c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute traffic or malware. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common social engineering technique where users are prompted to download password-protected archives, often used to bypass security scanners.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=telugu+love+songs+ringtones+free++mobile
    • http://files.opwtcstockton.com/uploads/1/3/1/0/131070762/begajawujipili-nazigam-wefukemo.pdf
    • http://files.tyruben.com/uploads/1/3/0/8/130813769/finuvenemejo.pdf
    • http://files.keystone-equestrian.com/uploads/1/3/1/4/131406181/d4251d307d3a.pdf
    • http://files.slaterfamilylaw.com/uploads/1/3/1/8/131871569/riwel.pdf
    • http://kedajon.bhexclusivecollections.com/uploads/1/3/1/4/131438641/c7b068.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8189/1989/files/pumimesarorutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/xorurujevezupezova.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/seether_broken_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/jovojido.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9701/files/44466553454.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/guidelines_for_management_of_acute_appendicitis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/32280446072.pdf
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/39399252342.pdf
    • https://cdn.shopify.com/s/files/1/0433/9502/3013/files/87463708103.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/kapezemekixexorowowi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5542/4423/files/ielts_writing_academic_vocabulary.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_off00006857.bin
61f0348b61653b09b4c666408bc7ae9c9be43c06496b3eb2fb29858867355045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6857 5028 bytes
font_01_sfnt_off00007967.bin
38e9c7a85ff9c77a2a128ab01ab6d2224b3eeb5fb5e9cbf97025c55e637ab630		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7967 10156 bytes

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