Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ce437f1fc99eb8…

MALICIOUS

PDF

46.6 KB Created: 2020-08-09 16:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9186536e4a07ec8f17110ce95703c517 SHA-1: f2015ccb3482a383ad763da5c666b33e00bdad98 SHA-256: 76ce437f1fc99eb81c5713b5ff977c46827679b91584755cb246b5a54ee31177
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to benign Shopify domains, but one critical link redirects to known malicious infrastructure at `ttraff.cc`. This suggests a link farm used to obscure the malicious destination. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect users. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=aftercare+eyelash+extensions+pdf
    • http://files.merwininsurance.net/uploads/1/3/1/4/131438423/sunifisefezabul-poritewegageted.pdf
    • http://files.mitradingschool.com/uploads/1/3/1/6/131607054/zamelo.pdf
    • http://files.spotorangedesign.com/uploads/1/3/1/8/131856039/xomiza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/adrenergic_and_antiadrenergic_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/datumegisimufeva.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8178/files/92318918442.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/livro_oraes_fortes_de_umbanda_e_candombl.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/naxoxam.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/17722464453.pdf
    • https://cdn.shopify.com/s/files/1/0430/1147/3571/files/murikefufejujurabiwedo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/dovatuwagesiraveka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0711/5423/files/rozurenapupuritat.pdf
    • https://cdn.shopify.com/s/files/1/0437/8843/5613/files/bufawuvugagojurexesilawad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8711/files/sivosag.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_off000075df.bin
356d95a04acedf547549529fb6fe65386b8d467452503eebb3f6a02bdd062060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DF 5400 bytes
font_01_sfnt_off0000884a.bin
bae6f6c78380856f5df0a37e4744d6b070577956451e26498ad110ca9f294fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884A 11516 bytes

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