Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a93d59a41eafdc0…

MALICIOUS

PDF

36.9 KB Created: 2020-09-09 01:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e777334552d837a920120bead3de290 SHA-1: 0947ed696c14f27667b2513b651ab82070f95782 SHA-256: 6a93d59a41eafdc0e581001df769e65fd7a3b58fbc7ec0da279342842efa6c81
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.me/wix?keyword=barrows+gloves+efficient+guide. This behavior is indicative of a phishing or scam campaign aiming to exploit users through deceptive links. The presence of numerous external PDF links further supports the classification as a link farm attack.

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.me/wix?keyword=barrows+gloves+efficient+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b58d21_01db5dcfc7ba41f99a4845a4578fe4a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_280c99c108fa45328f68c20215991b70.pdf
    • https://static.usrfiles.com/ugd/10b11f_c9bb3a502100436eafdcdf677ef853ca.pdf
    • https://static.usrfiles.com/ugd/96bf9d_43aaac0000a245e99460397a78a9efe3.pdf
    • https://static.usrfiles.com/ugd/6e3131_3ff9b3b455d648dfac6914df02ee0a0b.pdf
    • https://static.usrfiles.com/ugd/185c00_5840560e58b3439699a66f70b4af315d.pdf
    • https://static.usrfiles.com/ugd/2ddd39_a731f5f0a0b4474bb3fe79601df593c8.pdf
    • https://static.usrfiles.com/ugd/740d8c_1f2ba5d8611e4242baecdc45c9a30ed6.pdf
    • https://static.usrfiles.com/ugd/44b221_d7808c948dc9482e9f7de45d5ffbd209.pdf
    • https://static.usrfiles.com/ugd/de02f3_c3d15a794a734e4c8279f72a463ffd75.pdf
    • https://static.usrfiles.com/ugd/70c1f8_1257ed8ae0594095b6bfa286ffb79f5a.pdf
    • https://static.usrfiles.com/ugd/29c71c_439e58c508884705bebfd2f3e228b30b.pdf
    • https://static.usrfiles.com/ugd/b8c837_888f154a98fd4e1bafa54dac2af1c083.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7210/files/brother_mfc_9330cdw_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7503/files/49949765957.pdf
    • https://cdn.shopify.com/s/files/1/0432/0673/8079/files/nfs_underground_3.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_off00005210.bin
67372f50b175992e450c3f0aa3de95c6f2893adfce79e51fa50aebecdff5c263
pdf-font-stream PDF embedded font (sfnt) at offset 0x5210 5392 bytes
font_01_sfnt_off00006490.bin
ecb3f734fc146f0518c5869dd10bf8088f24546ea486a68def6f976dadcb4e4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6490 9928 bytes