Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41d596f3ce57b2b…

MALICIOUS

PDF

34.1 KB Created: 2020-08-30 05:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30b0bca85a4c4bd838f30cc0961cf071 SHA-1: 847d3cf75b680b638d8259fa64f76f8b8b8b467e SHA-256: d41d596f3ce57b2b4f9799872321327b0c022078259ec1d16defdcef85b24969
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=ninja+gaiden+ps3+review', points to known malicious redirector infrastructure. The document body, though heavily corrupted, also contains this URL, suggesting it's a primary lure. The presence of numerous other links hosted on cdn.shopify.com indicates a coordinated effort to distribute content, likely malicious, through a large number of PDFs.

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=ninja+gaiden+ps3+review
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/jolagalebupugabafibodez.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/80916226376.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3571/files/67311475375.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/95880744343.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/nokumemoxipiputu.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/osrs_melee_training_f2p.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6981/files/fotadexuwuxasosetenureduz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/3326587987.pdf
    • https://static.usrfiles.com/ugd/c63dba_d216cbe95a414ca28670137caf5da6fa.pdf
    • https://static.usrfiles.com/ugd/b11f6d_6a5eaa1fc14f4b1999e6f27d749ddd4f.pdf
    • https://static.usrfiles.com/ugd/77eba6_e8dd7a63355d4ffb8714e47c0a755758.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdf
    • https://cdn.shopify.com/s/files/1/0439/8042/3326/files/76210071072.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_off000048a5.bin
e0bc18074a9f909343b0bd5cf2084724788f01a01d3b59cb43835de7a04c0d84
pdf-font-stream PDF embedded font (sfnt) at offset 0x48A5 5456 bytes
font_01_sfnt_off00005b5b.bin
fa23d21861e40dba17627a3a78835d550aa9efbd281552962933d99e06213765
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5B 9580 bytes