Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed60ec2aac512193…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 13:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18cd5370f2cdbdf2382873ee0c40cfc8 SHA-1: ad8b266c77a629c348d6b50ae2cb577ec1128694 SHA-256: ed60ec2aac512193fd92e7b065e50aa21547071d645cdf949357e7745c0dc7c4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to the game "Call of Duty Infinite Warfare" and embeds a link to a known malicious redirector at ttraff.ru. This redirector likely serves to obscure the final malicious destination. The document also contains a large number of links to external PDFs hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to increase visibility.

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/wix?keyword=call+of+duty+infinite+warfare+guide
    • https://static.usrfiles.com/ugd/b8c837_762b6dbac868490a9eb1d82683b1ecc1.pdf
    • https://static.usrfiles.com/ugd/b85eb0_5073ea8763a542d699f97ed24808c42d.pdf
    • https://static.usrfiles.com/ugd/c068f8_a315815c508e4197a97433ed3cf61f1c.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_59bc8e0881234af9a2b2ad307d572775.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3863/files/tanuvugolunoxusemazekejev.pdf
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/fesunematerutobaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/dumiz.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e8dad06ab114994a11c46421c81dde1.pdf
    • https://static.usrfiles.com/ugd/b8c837_044e78700e9f47cb857e1dc0d1e58284.pdf
    • https://static.usrfiles.com/ugd/f0f215_261b6360587e4452b715db89f0cbc2b9.pdf
    • https://static.usrfiles.com/ugd/2d1648_d0f1a51096af4c24afbeafd2d355131a.pdf
    • https://cdn.shopify.com/s/files/1/0438/6032/8608/files/39136404071.pdf
    • https://cdn.shopify.com/s/files/1/0434/7222/4421/files/91776880683.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/gepeligikinutiwotusop.pdf
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/rachmaninoff_prelude_in_g_minor_piano.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_off0000624d.bin
82ccccab1d8685d22d207a736d4d5bd4ff5675e80b52a4d9e3c8bc9bd1cf79b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 4996 bytes
font_01_sfnt_off00007373.bin
5dc43d2168b2d7d652be89cb538836b2fa08d084e3ed8e51ed9cf9069de1f406
pdf-font-stream PDF embedded font (sfnt) at offset 0x7373 10404 bytes