Malicious PDF — malware analysis report

Static analysis result for SHA-256 341d29345202289e…

MALICIOUS

PDF

44.0 KB Created: 2020-08-23 13:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d930d41fa3f4ffb53e1005d887e4e9bb SHA-1: d43b5bffd464e84f7787ce63bfc57d96a450e483 SHA-256: 341d29345202289e3dfae50c56fab6f988526614476274f71a15ba2b9b92e9ae
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=spotify+apk+indir+pc
    • http://files.msmandysline.com/uploads/1/3/0/8/130874544/810646.pdf
    • http://files.corkhives.com/uploads/1/3/0/7/130776720/litubev_bojaziza.pdf
    • http://files.monsterinktattoostudio.com/uploads/1/3/2/7/132710671/rufumajokijan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/7684/1635/files/dragon_nest_mobile_guide_priest.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/figusagadipexano.pdf
    • https://cdn.shopify.com/s/files/1/0443/1613/1484/files/carprofeno_en_perros.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/81926368913.pdf
    • https://cdn.shopify.com/s/files/1/0432/3098/6400/files/poxamemotasolurena.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3008/files/dj_sagar_cg_mix_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/71358755639.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/25173170340.pdf
    • https://cdn.shopify.com/s/files/1/0464/5152/3752/files/interview_techniques_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/61855797646.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/63587498509.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/fisanukabazut.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/ribolazoguma.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_off0000614e.bin
fc1c8a4de4a27c566afd212b10a750d025793ae731fc5a76948b78cf34134721
pdf-font-stream PDF embedded font (sfnt) at offset 0x614E 5208 bytes
font_01_sfnt_off00007318.bin
ac20208b328baad28680c4fc361c58d5aed3a89df34522883325bfdebb8381cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7318 15128 bytes