Malicious PDF — malware analysis report

Static analysis result for SHA-256 8263f903cc2f6d7f…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 11:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb0aff942084c2036a392c2575d7393a SHA-1: a6052c88cc6699c8b81290031f81fa821075cc6b SHA-256: 8263f903cc2f6d7ff9fe2f64f351a30e04ccf2f81cb7659e7a522c01c3c9a113
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

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=physical+therapy+exercises+for+biceps+tendonitis+pdf
    • http://files.janetpumphrey.com/uploads/1/3/2/6/132680781/3b7663f57da9f65.pdf
    • http://setok.ameliasclosetfilm.com/uploads/1/3/1/3/131384281/4627717.pdf
    • http://files.saverellaswim.com/uploads/1/3/1/4/131483053/030eb4963fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5887/8872/files/40562462381.pdf
    • https://cdn.shopify.com/s/files/1/0433/6304/1430/files/11325757571.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1957/files/5935653575.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/45942801258.pdf
    • https://cdn.shopify.com/s/files/1/0433/5016/3609/files/rusted_key_risk_of_rain_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/29260791710.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/accidentals_in_music.pdf
    • https://cdn.shopify.com/s/files/1/0447/5322/3829/files/cervical_spine_stabilization_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/majin.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/convert_bmp_to_high_quality.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/46441261019.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/37241458673.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_off00007259.bin
d386c28333f312427b94601c2ea4e76952dea0d15826a98e2a0a510a533b8397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7259 5556 bytes
font_01_sfnt_off00008524.bin
2408db06cad5db5c5a7f3d6fa34dddc2cd76382100137b13d4e6706007c23717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8524 10036 bytes

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