Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a607f1dfc5c0dba…

MALICIOUS

PDF

38.4 KB Created: 2020-08-07 19:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd48d9cb955c8981f936f571fbcbb93f SHA-1: 8dd8871d1fa14ca891675fe6805bbef1b898484d SHA-256: 5a607f1dfc5c0dba0b3b1d3dc1b36f3027305b58483303ea41673dcf9211646b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL, reinforcing its 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.cc/pify?keyword=data+analysis+using+sql+and+excel+2nd+pdf
    • http://virutani.rhinckeducation.com/uploads/1/3/0/7/130775795/fixunovezalab.pdf
    • http://munemura.clonesac.com/uploads/1/3/2/7/132712615/vadizubalapiriko.pdf
    • http://files.werbrave.com/uploads/1/3/1/4/131483955/xaxuxirijufives.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/31737084185.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/gejaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/gobimosesej.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4512/files/heterogeneous_catalysis_principles_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/37771797557.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/miluv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9083/files/xatesalipositop.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/risirutemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/55631165352.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/felazidud.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0695/files/vineleg.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/wenofejubalesarazavula.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_off000056fc.bin
99a4ddfb2300a28aad1bc4a4d3af40ffa4aff0fa2d50f234206ec3fe4704cc0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x56FC 5656 bytes
font_01_sfnt_off00006a6b.bin
d4782720b33d4486a590873e2b1fdefba4c48fe9abb1f6b374231b1be5324aa7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6B 9916 bytes