Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a4e64f36929c7f6…

MALICIOUS

PDF

50.0 KB Created: 2020-08-16 19:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d2fc6235c5479575abe2cf6b80a7baf SHA-1: d3fe2da3b658b2352d7b7062edb09222142c4bb8 SHA-256: 6a4e64f36929c7f6424fb033b3d4629b70cec3a6cb287b3501a97ea5faef3907
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains the same URL and other links to PDF files hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=ibrahim+sangare+scout+report
    • http://files.naheffa.com/uploads/1/3/1/4/131453316/9475297.pdf
    • http://files.asheleijohnsoncounseling.com/uploads/1/3/0/8/130874634/4885750.pdf
    • http://lonuwe.informationsystemdynamics.net/uploads/1/3/0/7/130739024/f95a5b830040.pdf
    • http://files.followtheleda.com/uploads/1/3/1/3/131384436/dilelelurizup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/24991130108.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/likedidowudubit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8775/files/74053892151.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/lodevukesutefuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/diliwekesatojijubonamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/93672859118.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/53828847660.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/33054666654.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/putew.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/63632437678.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_off00008542.bin
2f53c0b338b27d8c4c34f23d8a247e13c62c19be9d9b1b8e636600e98bcd3db2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8542 5392 bytes
font_01_sfnt_off00009768.bin
496dee1c59167051124c81562d5de2aba1afc62732f2b2bdb24e19351bb3946e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9768 10576 bytes