Malicious PDF — malware analysis report

Static analysis result for SHA-256 750ad97c6b6e291d…

MALICIOUS

PDF

45.5 KB Created: 2020-07-28 11:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8028846017b917f13e7cf722dca266fc SHA-1: a77d448fd515edeb648757432487c4053481ecb5 SHA-256: 750ad97c6b6e291dc691062f36c861e105b19125d69bda6ce801e6990ab5a6b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with the primary one pointing to a known malicious redirector. This suggests a tactic to drive traffic to malicious infrastructure, potentially for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=dust+battle+royale++free
    • http://files.asapbwh.org/uploads/1/3/0/8/130874254/pezanipifugosiz.pdf
    • http://files.edgeprogram.info/uploads/1/3/1/3/131398059/fegaji-muvaduni.pdf
    • http://files.sullivanwoodart.com/uploads/1/3/1/4/131409693/0e0717.pdf
    • http://files.theredroomproject.com/uploads/1/3/0/7/130775838/5136375.pdf
    • http://files.wicomicoriver.org/uploads/1/3/0/7/130738614/rarijitubu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4571/6119/files/57002237701.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4852/files/55405661124.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sividejujim.pdf
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/66044186131.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/45739982480.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/63085403954.pdf
    • https://cdn.shopify.com/s/files/1/0435/6525/2769/files/59222181351.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/44022258609.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/71839138861.pdf
    • https://cdn.shopify.com/s/files/1/0430/9476/9821/files/83656112019.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/gamigudibuletowigazet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/letarigikobesogexazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/28476321253.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_off000072b4.bin
4659b317d378ee6dca54c251d8460fcabbd61f95653d350211fdaad1944b4953
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B4 4732 bytes
font_01_sfnt_off000082ec.bin
817eb95c134359ee3482bab6ea9b7d8e0d7b3aaf3e5be1bdc2d33ce02dcbac6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x82EC 11176 bytes