Malicious PDF — malware analysis report

Static analysis result for SHA-256 f218eacf3b5ab13b…

MALICIOUS

PDF

50.3 KB Created: 2020-08-31 11:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d6326444e83350919b2b7c11b36457a SHA-1: 22f8f04aff55aa8f5dae366f48ec9503cc30860a SHA-256: f218eacf3b5ab13bbd4671bc45c9a1977e3a7d5ae9007d95d3d1d1ab7c9a0aed
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic indicates it links to known malicious redirector infrastructure, specifically 'ttraff.com', which is likely used to obscure the final destination of the attack. Another heuristic identified it as a PDF link farm, with many links pointing to Shopify domains, though one of these was also identified as a redirector. The document body itself is heavily obfuscated and contains the malicious URLs.

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/wix?keyword=standard+recipe+advantages
    • https://cdn.shopify.com/s/files/1/0431/3759/7607/files/android_tablet_apps_to_sd_card.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/zoligilozunenevum.pdf
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/git_remove_branch.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/16480005711.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/16960806191.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/17183801098.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/nipekugugivulexixenawu.pdf
    • https://static.usrfiles.com/ugd/b8c837_4163bf30943147c6a16d8248eb7af845.pdf
    • https://static.usrfiles.com/ugd/e32576_35b88207b62a4891ba00fb06ea7cd68a.pdf
    • https://static.usrfiles.com/ugd/49be48_549ba920658e4e67b5377efaeaf08f4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_90cbdfe5e4e44502bfc36b782c597e03.pdf
    • https://static.usrfiles.com/ugd/16a96a_46bab89afbd64c66a08bd1cf37121f1c.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_off0000863c.bin
df30ee9ddef00e3c5617614f50ea67b8767a3c52a1ab3645458338e072671a6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x863C 5372 bytes
font_01_sfnt_off00009891.bin
e6fa04dbfa4bcea301a8feb3b3b49a808807b3d7069a1b46b1a85ce4b9bfc929
pdf-font-stream PDF embedded font (sfnt) at offset 0x9891 11036 bytes