Malicious PDF — malware analysis report

Static analysis result for SHA-256 468d5327f70dd53e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-15 03:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2fd6cd37d1ad3e2e3554461d61784c7 SHA-1: ddb924c5d78881130f5f67f03ec3260261f8b402 SHA-256: 468d5327f70dd53e68218000b7839d4c55b46934b1f164839316f2fe3f56e56e
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=biweekly+payroll+calendar+template+2018'. The document body, though heavily obfuscated, also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or redirection strategy. The primary malicious URL is likely used to redirect the user to a phishing or malware distribution site.

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/pify?keyword=biweekly+payroll+calendar+template+2018
    • http://files.homefirebooking.com/uploads/1/3/1/4/131453284/pafaranagunibizawimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5990/files/nucleo_de_accumbens.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/33745566070.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/analytical_skills_mcqs_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/57177378701.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/14403629889.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/jojotizolinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/savuturavag.pdf
    • https://cdn.shopify.com/s/files/1/0437/6372/8545/files/gupojuremipovubotarakujo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/lusulurefagudabe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2893/7884/files/escala_cromatica_clarinete_si_bemol.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/22980256226.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/88649756638.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8487/files/zatomelatakukixujakiletag.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_off00005d1b.bin
67c79d50c6e86d47b80807cdaa67cb8ffcba93ba2143c1159da233b830ae78ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1B 5656 bytes
font_01_sfnt_off00007054.bin
4ed467bb37e2e6dd177152b0af1cc3933cdcfa906473586cd8921e40f48344f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7054 9924 bytes
font_02_sfnt_off0000921a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x921A 4324 bytes