Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff56dff52fe6c55b…

MALICIOUS

PDF

46.1 KB Created: 2020-08-22 02:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed8f00ffa1cdcc33b8eedc2408c7507e SHA-1: a511ff43d7c41db8113e09e9509f9e61e28316a7 SHA-256: ff56dff52fe6c55be6620fe29642b83911c9afcb208595df87b75016096ec51a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs hosted on potentially malicious domains. The presence of numerous embedded links, many pointing to Shopify, suggests a link farm or SEO poisoning attempt to mask the malicious redirector. No scripts were extracted, limiting the analysis of direct payload execution.

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.cc/pify?keyword=cards+against+humanity+90s+nostalgia+pack+pdf
    • http://tipijikog.relapse-after-hsct.com/uploads/1/3/0/8/130813650/logolim-kevalekamido-navafirefigu.pdf
    • http://wejoned.skyhighservices.com/uploads/1/3/0/8/130814328/bekenazifobuwuji.pdf
    • http://bavasu.totsandco.org/uploads/1/3/0/7/130776089/zuwir-gilatewil-sisas-fajid.pdf
    • http://files.michaeljbeilfuss.com/uploads/1/3/1/3/131379049/belinux-tidor-gunowixeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/kijononegapusuxep.pdf
    • https://cdn.shopify.com/s/files/1/0439/7203/4718/files/rojid.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/nijelubowutodijedazi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/81161290756.pdf
    • https://cdn.shopify.com/s/files/1/0447/9208/6685/files/lagu_bukan_cinta_biasa_cover_intan.pdf
    • https://cdn.shopify.com/s/files/1/0451/4581/7253/files/manual_of_afrotropical_diptera.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/89775898907.pdf
    • https://cdn.shopify.com/s/files/1/0440/8141/4296/files/76411521661.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/65409207745.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7805/files/wurekowepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/rexusakarel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/tudukuresipu.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_off0000746b.bin
7ea4e2876c8a690134ab71e75d045d91771778cb275d9c3b4781ab4f5c12b560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746B 5940 bytes
font_01_sfnt_off00008873.bin
84487dd38385cbcbb2d919aeba02976eb5fb36a16c87a61ab4b1358c6aee0c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8873 10124 bytes

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