Malicious PDF — malware analysis report

Static analysis result for SHA-256 1529b814a1a90246…

MALICIOUS

PDF

45.0 KB Created: 2020-09-09 00:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8efd0a8a8b0b9b19591b632e8cc552ac SHA-1: 29fa2971d5dc2768ba9ac42b517c03e8f1c2b67e SHA-256: 1529b814a1a902462663a10e5a2ec751fcd324f2dc897df8b637c2dd0d222225
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into clicking malicious URLs. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous external PDF links also suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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/wix?keyword=personification+poems+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/0779a3_d0785c578a964b0ea2c59c365db792e0.pdf
    • https://static.usrfiles.com/ugd/3aee12_e978cf120d70440db8f3d366e3a1b700.pdf
    • https://static.usrfiles.com/ugd/0d9a50_e368c03d55e740d7a4dfd914c1e62857.pdf
    • https://static.usrfiles.com/ugd/64e449_6e6133d39df841e190b45c9d30fbfbaf.pdf
    • https://cdn.shopify.com/s/files/1/0462/6586/0253/files/antivirus_performance_comparison_2018.pdf
    • https://cdn.shopify.com/s/files/1/0443/1344/4508/files/rigin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/dubipiti.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/widget_calendario_google_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/space_engineers_thrust_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/sivav.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/wunepasajekudobiwakore.pdf
    • https://cdn.shopify.com/s/files/1/0428/4511/0438/files/lusaxavexefop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ba.bin
5c0a715c35e7c8d30bed806f157c72f74ece8d2cd864412788c9bf573e104bf5
pdf-font-stream PDF embedded font (sfnt) at offset 0x64BA 5060 bytes
font_01_sfnt_off000075c3.bin
93c97ddf0645aecc0e2eadabe1326e0cd18c67ae064788986dbcff14ddab3cd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C3 10396 bytes
font_02_sfnt_off00009935.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9935 4324 bytes