Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a64b8732088bc2f…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 18:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2256c45c0609e2c432cc16385e78d383 SHA-1: 4d6222cdb4c28e66e4312cf5e63dae0dfb15bcbc SHA-256: 2a64b8732088bc2f14000b730697180f26d93568cd33e88550d8ef0f864c23e6
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=pakistan+job+application+format', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to job applications and the malicious URL, suggesting a phishing lure. The presence of numerous other Shopify links indicates a link farm strategy to obscure the malicious destination.

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=pakistan+job+application+format
    • http://files.lbhomeschoolhelps.com/uploads/1/3/1/3/131379639/5cd60fba.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/81737617268.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/720912377.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/lebelig.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/lanojagorumivanison.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/jesujapuvokogolazi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/phonegap_camera_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/50998337035.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/gunatomegipironazunowa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3605/files/temekoludusawigo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/xumowukoxerilakifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/84248363342.pdf
    • https://cdn.shopify.com/s/files/1/0438/0341/0589/files/electrical_engineering_materials_mcq.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006117.bin
59143814edab142a9a61a76f0b49b5ca1c7c5041e85af8be7d2113b63370236e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 5440 bytes
font_01_sfnt_off00007381.bin
03b868afb67e7a03ed0141adf26fc7f75cfd0215f4c1c4354435d73081450f25
pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 10264 bytes