Malicious PDF — malware analysis report

Static analysis result for SHA-256 6681c4ab984ade30…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 17:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd4b788a5f3cdf9496b4e4d275ea02f8 SHA-1: 00e2d0028ebdae0a857f19004b947083f4d2bf3d SHA-256: 6681c4ab984ade30d61847dcec65cc7f309d2fa7bb80963fa9ea3840ae29330a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains, suggesting an attempt to create a link farm for SEO manipulation or to host malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which further directs to a Castrol-themed URL. This indicates a likely phishing or scam attempt, leveraging seemingly legitimate domains to mask malicious intent.

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=castrol+edge+0w+30+a3+b4+pdf
    • http://files.maximilianfranz.com/uploads/1/3/2/6/132682868/d62f6d5b.pdf
    • http://files.durgansc.com/uploads/1/3/1/4/131453855/weloguwikop_tivak_rekagofas.pdf
    • http://files.petenicholsonhealing.com/uploads/1/3/0/9/130969364/7297116.pdf
    • http://files.dfsplanroom.net/uploads/1/3/0/7/130740536/a2824d0cd17.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/shopping_vocabulary_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5501/files/gsxr_750_horsepower.pdf
    • https://cdn.shopify.com/s/files/1/0433/6789/1094/files/58819833515.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2490/files/kebebifuperazelunalolesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/zotexole.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/84754275222.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/lobem.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/computational_complexity_modern_approach.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/balanitis_xertica_obliterante_tratamiento.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_off0000654b.bin
e34a5ef0bdc4c59b076e7e58095da1915e5b86f2400cf865879eeb6f4e6156ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x654B 5740 bytes
font_01_sfnt_off000078fa.bin
601fde96e270d36de336138f5a0e9235fae5e53de9341d83e9ee24b44ab20918
pdf-font-stream PDF embedded font (sfnt) at offset 0x78FA 11164 bytes