Malicious PDF — malware analysis report

Static analysis result for SHA-256 190523174deaad24…

MALICIOUS

PDF

39.7 KB Created: 2020-08-18 15:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1914984187a71eed0dd6d59fd7489589 SHA-1: 12ec1aca4a009380d7165158e24381679931369a SHA-256: 190523174deaad24e35dc4106554db5673f3a02e3e930bee8963ed5717ecfab1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=tp+link+wifi+pci+card+driver'. This indicates an attempt to direct users to potentially harmful content. Additionally, a PDF link farm heuristic suggests the document is part of a larger SEO manipulation scheme. 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.com/pify?keyword=tp+link+wifi+pci+card+driver
    • http://tasakuba.dogfacepet.com/uploads/1/3/2/8/132814718/jabav.pdf
    • http://files.workingwellwithmen.com/uploads/1/3/0/9/130969825/6902475.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/xonivejopelanufepav.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/xemexeribireremawisiginob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/8534271276.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/59070504290.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/bikodora.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigemeziguvego.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/biotronik_orsiro.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/65449168337.pdf
    • https://cdn.shopify.com/s/files/1/0429/6658/1407/files/presentations_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/6483/3686/files/44739521125.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/probability_sampling_in_quantitative_research.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_off0000529f.bin
826c282a24f59c36c079117892f7e042cc20fb132fe2bf90685c3d9a94bb6fd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x529F 5136 bytes
font_01_sfnt_off0000643c.bin
fc9cd73a64bffd352bbf61816140dafb29842a56f97c908eb7b70408d004d1d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x643C 14652 bytes