Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaeb056c484bf37e…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 09:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d0b9aa151d750d03e2869c089e0d370 SHA-1: d70fd296338eef92a654344c196c7e7d2b652c88 SHA-256: eaeb056c484bf37e4c146f8f675f0dd5f9884e4258f6e9827e6ec3b59dcbe219
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.ru/wix?keyword=gout+cookbook+pdf'. This indicates a phishing or social engineering attempt to direct users to malicious infrastructure. The presence of a large number of external PDF links, flagged by PDF_SEO_LINK_FARM, further supports the social engineering lure. No scripts were extracted from this sample.

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=gout+cookbook+pdf
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/kegemurujopifexaxewogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28851780814.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6824/files/laboratory_report_6_epithelial_tissues_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/9493960776.pdf
    • https://static.usrfiles.com/ugd/b8c837_d698581ab6b34881bb95e69b237368cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_a921ceb042c048c6ad96a9a97165a4d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_adcc115665af4fb4aed394875277abb9.pdf
    • https://static.usrfiles.com/ugd/b91566_1ef40febb6b1486fb25176e4507c5356.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_b9e61588aed14f51a6d5b40102d6fb3c.pdf
    • https://static.usrfiles.com/ugd/63d3ad_8d8a61ea2b2c4e51acc7657356f04491.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f9e051fc1024cb1a83a812d439373db.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006782.bin
fbde74c98b4a29c534da195e1d418e1d066e5f0b185d7a2b2c3e4377e778cfbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6782 4480 bytes
font_01_sfnt_off000076cc.bin
8211fd03012eb56c8f98ddf6aac25c0ec59a40fb21aa822f14f8b0a7d3f005ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x76CC 11084 bytes
font_02_sfnt_off00009c2b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2B 4324 bytes