Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d750c5ad0a6444e…

MALICIOUS

PDF

91.1 KB Created: 2020-08-30 09:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c55318d27891010526f757819b375d9 SHA-1: 9ad2ffbd6cf0d8709a9c2e6657b7b1d3188df36f SHA-256: 0d750c5ad0a6444ee2d16d45d65aa64cafb164711d478157acca29d792e4d9fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to malicious content. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to local business searches. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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=reed+plastics+beltsville+md
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/46905785541.pdf
    • https://cdn.shopify.com/s/files/1/0435/1465/8980/files/tebudisuzelojijironobes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/9453874584.pdf
    • https://cdn.shopify.com/s/files/1/0448/9153/7563/files/how_to_write_bold_in_whatsapp_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/davegamakuvobavuki.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/eye_bird_map_view_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/4517/3910/files/kavonixizorikosavus.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/43697467840.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/14081766178.pdf
    • https://static.usrfiles.com/ugd/1c90dc_21e19709d34f47c6b6386a5102067a9b.pdf
    • https://static.usrfiles.com/ugd/353d00_d7a06c3b5ef547debfbdbbb13e7b1d90.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cb1.bin
8617382eba796b47722a4fa0c313f93e3d986a17cfbb1f01d2b84c19648d58ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB1 5328 bytes
font_01_sfnt_off00012ec1.bin
dd893fb31e0e45084064fea55f7cfc0392eb676cf9038b8ec1953aadb6e4438e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC1 14768 bytes