Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed0812d43f1a30f…

MALICIOUS

PDF

33.5 KB Created: 2020-09-01 10:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d04deb0e1082eb7123a9fa06a511d5ec SHA-1: 0a35211f709fabc900192076bf29a78d452f2943 SHA-256: aed0812d43f1a30f2b0df809b8a29de77194c3a564d754d1864416b1bb0986fb
152 Risk Score

Malware Insights

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

This PDF document functions as a link farm, embedding numerous links to other PDF files hosted on Shopify and usrfiles.com. One of these links, ttraff.ru, is identified as a known malicious redirector, indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=condom+dj+song
    • https://cdn.shopify.com/s/files/1/0449/9079/1844/files/83463590044.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/xazegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4294/files/vatatewawoworus.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/falebevevotu.pdf
    • https://static.usrfiles.com/ugd/b8c837_af3fb698941c4120bcebc329ca68dcf0.pdf
    • https://static.usrfiles.com/ugd/98e298_8ffdd464f4a640c1965d25ee2c194777.pdf
    • https://static.usrfiles.com/ugd/9b5f63_973662a7f2e140b4b9c927ce671f5d43.pdf
    • https://static.usrfiles.com/ugd/5926b4_91a8c057f9f146b6b5589235197d9687.pdf
    • https://static.usrfiles.com/ugd/7ff653_dbd78cc8ae924af8a68a119d8ac5f8e8.pdf
    • https://static.usrfiles.com/ugd/86319b_5cfe2df63352456fa3b3ea65240b3662.pdf
    • https://static.usrfiles.com/ugd/f65518_d965f9f03c5e418bb557c6c958af99b3.pdf
    • https://static.usrfiles.com/ugd/63d3ad_a855438ec078426b829c56cf5e6a2ae6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4561c2183f94120b0ed500ba06b6d3c.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_off00004508.bin
ffe144d74c391a8f055b7e899a3c7aeae756fbaf2e871d2c1d4d041dacf2b929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4508 4788 bytes
font_01_sfnt_off00005545.bin
2b54ac04827f53a5d7defe60b689e5f56e87283f3d8623a2fa2510d1878e0f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5545 11124 bytes

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