Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e3b9a632722382…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 14:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21ed8a46dbe735e6b72063bbb3fe4382 SHA-1: 929ab781cd74670e9ea5fc792dc3fc85601ec961 SHA-256: a4e3b9a6327223823520685e52447b5bfd8e01e32437c911f44e93930cffd0dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, suggesting an attempt to disguise malicious content. The presence of numerous external PDF links, many pointing to Shopify, indicates a link farm strategy to obscure the ultimate destination. 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.com/pify?keyword=maa+laxmi+amritwani
    • http://zekafejof.caregiverinspirations.com/uploads/1/3/0/9/130969279/risod.pdf
    • https://cdn.shopify.com/s/files/1/0441/4459/1000/files/tokaduxilajowofukeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/64150483093.pdf
    • https://cdn.shopify.com/s/files/1/0431/3323/9457/files/76239405550.pdf
    • https://cdn.shopify.com/s/files/1/0432/8220/2782/files/2575402631.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/42706183414.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/matadakuxoxuxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/xibumifuduzenuwamobuloz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6992/files/27801420102.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/kofaxobikidizotika.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/kamifiluximokakulatu.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005624.bin
fb36d51ac85eeb626d13ef3e131020a3f54cf40b71c6c4f5ab9da9a46ac46795
pdf-font-stream PDF embedded font (sfnt) at offset 0x5624 4820 bytes
font_01_sfnt_off00006685.bin
c327de10bda8c81efd44aa604569992078529a949bbbbc7c8e9d2a623dacfbbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6685 14076 bytes
font_02_sfnt_off0000936a.bin
96181a9fe869766bf48700f7a8fabf05a38e3f1928078676a0bbf59d446119ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x936A 3760 bytes