Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00c6081023c4e18…

MALICIOUS

PDF

58.5 KB Created: 2020-09-02 12:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3328f42fba8eb73b7eaad15502c8747b SHA-1: f6613d19c02b8bd807c6832f48162bbddfcae29c SHA-256: c00c6081023c4e18533fd14f361b4d706431486c8ddca28e6ff2a06ecc93cb96
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, contains the same URL. The presence of a PDF link farm further suggests malicious intent, aiming to obscure the true destination. The ML classifier 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.me/wix?keyword=missing+addends+worksheet+1st+grade
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/zuxezinu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/mevuvifolisuxovemitigive.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/jizupujudomidizukotimux.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/54285504366.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/lukoxupejobavi.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea840c07449841309ba662df1533cf19.pdf
    • https://static.usrfiles.com/ugd/286fb8_1572a2e2b9fd4027b59a6234eb1cd035.pdf
    • https://static.usrfiles.com/ugd/f3cb45_61a27620650a40898587c100a1b7c1c0.pdf
    • https://static.usrfiles.com/ugd/a01749_53931d8ad9d24b00a8b79096c1fcb28c.pdf
    • https://static.usrfiles.com/ugd/c8a981_8e5882e3ed244dcb93f3cab7eb528659.pdf
    • https://static.usrfiles.com/ugd/b8c837_04fa874a83df4c588b913a7b1eb74058.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_off0000a653.bin
280b9cfa3488bf75b9bb190ac7e865dad3709f768e3de9ebb30b565dea73893e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA653 5268 bytes
font_01_sfnt_off0000b856.bin
5f89a293e5189867fcef69ca369b3fe10cbf12f7e355f60058b1cceaecb7117c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB856 10332 bytes

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