Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6986ca0ba5b1e3…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 02:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4ef595cfeba7681e4a77b312b74a50c SHA-1: 9120c9d025a276961c728af5ef3d448c97312635 SHA-256: ab6986ca0ba5b1e36e6c13b15f978dc42717a30a71a84f97b86850644122ef8c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=android+app+store+whatsapp'. This URL is likely used to redirect the user to a malicious site or download unwanted software. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to external resources, many hosted on Shopify. The ML classifier strongly supports the malicious verdict.

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=android+app+store+whatsapp
    • http://files.m25initiative.net/uploads/1/3/1/4/131437702/rogitew-lemowel.pdf
    • http://galiw.ghentlacrosse.com/uploads/1/3/0/7/130775934/ca7a4e.pdf
    • http://files.ksexoticfragrances.com/uploads/1/3/1/4/131406544/gimapizitibup_pivetebufaga_fedujowunum_niregezet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/canalis_lighting_busbar.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/91152371840.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/world_cultures_a_global_mosaic.pdf
    • https://cdn.shopify.com/s/files/1/0439/0528/6296/files/auditing_standards_and_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/3947/3314/files/gasilagutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/biblical_definition_of_leadership.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/75431600428.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/87544436332.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/roxivalujizedofamal.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/64972231916.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_off00005e03.bin
9798dbecf197fce91440b5a30ab5e68726d2eef556eb3c41222ccf1ce209e608
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E03 5096 bytes
font_01_sfnt_off00006f5d.bin
1b1cef1770636645442e0de8d0f2af843d2541b1d552f237ab335446dd054e15
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5D 10288 bytes