Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3b930ab3335d89…

MALICIOUS

PDF

47.5 KB Created: 2020-08-20 19:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df8ce2abab682141eed7b328b27b44f6 SHA-1: c9a0bc3a33e14aed1d4fa8f57859852a007acd6e SHA-256: 8e3b930ab3335d89716a7f40e2961ce7865afe0833a7938ec357304e18d16b4f
154 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 pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a similar URL related to fitness. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is likely intended to redirect the user to a compromised site or phishing page.

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=best+body+transformation+gym+london
    • http://levedij.stpatricktheatre.org/uploads/1/3/1/4/131452958/digabodo-migoxefilimi-donukiramon.pdf
    • http://files.solerconsulting.com/uploads/1/3/1/3/131384542/5787947.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/17255110916.pdf
    • https://cdn.shopify.com/s/files/1/0454/0334/0968/files/hotel_room_design_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/49809249685.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/pevibad.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/arcgis_server_10._7.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/63727853717.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/western_blot_principle.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/88087021929.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/wordpress_private_page.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/characteristics_of_information_communication_technology.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/50748241023.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_off00006d60.bin
daa47a412459fea363a075fea060702c0852cb903b5bafade5d62c4c41d8836c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D60 5308 bytes
font_01_sfnt_off00007f50.bin
eb4975ecd5c20721527b5dbf4c9d0f6a4cc8fc6fb3bd9e36121d3dd5f86236bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F50 10396 bytes
font_02_sfnt_off0000a2eb.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2EB 4324 bytes