Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cb6baf125e99fd…

MALICIOUS

PDF

44.8 KB Created: 2020-08-09 16:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e141e88fcf76bce054d80f675831ee2 SHA-1: ece47c3cb7e40910106fc673c55d3268cfc5d865 SHA-256: 12cb6baf125e99fd0cbb6f48adac1abaa14ebed44d0a5286664ff5232e436451
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body is obfuscated but contains text related to game rules and a URL that appears to be part of an SEO link farm. The presence of many external links suggests an attempt to drive traffic to malicious or spam sites, likely as a form of phishing or SEO manipulation.

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=axis+and+allies+europe+1940+2nd+edition+rules+pdf
    • http://files.tylerpaytas.com/uploads/1/3/1/4/131438437/jowipinado.pdf
    • http://files.peterandjohnepiscopal.org/uploads/1/3/0/7/130775400/da763ed.pdf
    • http://files.beautifulfacesbyerin.com/uploads/1/3/1/3/131380440/bfe120e.pdf
    • http://files.riverviewcounselling.com/uploads/1/3/2/6/132681392/eb663c3993e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/95618246532.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0146/files/67600263947.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/west_point_lake_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/pokemon_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8627/files/60127561579.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/1165908086.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/mimifalafevurixiror.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/zifujizagesuwobe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8724/0095/files/33586841108.pdf
    • https://cdn.shopify.com/s/files/1/0436/2108/9444/files/nuwemaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/lebemajojesuwam.pdf
    • https://cdn.shopify.com/s/files/1/0434/2877/4044/files/minolta_hi-_matic_f.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_off0000708d.bin
d367384a318bc3a1b479c231f22caf51a8ec79ad890c399833b7e248b8ba4704
pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 5660 bytes
font_01_sfnt_off000083e9.bin
8676763f90d19b54a6ff5f21643d7c97727fbbb8a1732a229332cea71e33b1db
pdf-font-stream PDF embedded font (sfnt) at offset 0x83E9 10068 bytes