Malicious PDF — malware analysis report

Static analysis result for SHA-256 3265450bbfa6428a…

MALICIOUS

PDF

135.0 KB Created: 2020-09-06 05:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1633e1d0bc39558bb1f98cb445f115d1 SHA-1: 04de9a11d9bc2e40464e60e39ba39246bc5a9646 SHA-256: 3265450bbfa6428a18fea0ddc2f908f7a3614806ff99d8f6f0dac7d89eefc4eb
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=bhajan+songs+odia', which is also listed as an embedded URL. This suggests the primary purpose is to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.club/wix?keyword=bhajan+songs+odia
    • https://static.usrfiles.com/ugd/baef12_f54ef0a50ee54b228aff6769d2612724.pdf
    • https://static.usrfiles.com/ugd/2c8d66_ed94822acef74e29b5f9b9b1c7e504f1.pdf
    • https://static.usrfiles.com/ugd/8d5d69_af797287f247489d812e8f989de89004.pdf
    • https://static.usrfiles.com/ugd/6e3131_b4347bcc6b164a09ad3fd5fccb0f0d3a.pdf
    • https://static.usrfiles.com/ugd/11f207_b965a3262fc041d08a64dacddb24dbd7.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/15749888.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6757/files/french_to_english_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/bunukesoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9424/4516/files/41032856633.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/22541198437.pdf
    • https://cdn.shopify.com/s/files/1/0435/1462/6202/files/47580239319.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/75156542535.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_off0001c517.bin
73bf71dc1e22cbfdb8aa0d5c6a16d5dc68ca390f421cd7b16e763e7c07c38b95
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C517 4676 bytes
font_01_sfnt_off0001d4e7.bin
8901b1721e06954e1b69a70eb171fb247cf1e9328d267fa5da0e3b8aeac0574a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4E7 14324 bytes
font_02_sfnt_off00020197.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x20197 4324 bytes