Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc229e4b99040cd…

MALICIOUS

PDF

36.6 KB Created: 2020-08-21 01:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7b5320406da7f50b582805c520c24d9 SHA-1: d15c5c095c60c5e0e35eadbba4f730de8f95eae3 SHA-256: 5dc229e4b99040cd953e2077bf929c6b4a905126340f0a3b9a1d9fab8f6f8993
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body also contains a URL that appears to be a redirector. This suggests the primary purpose is to lure users to malicious sites, potentially for further exploitation or phishing.

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=clayderman+ballade+pour+adeline+sheet+music
    • http://lakinowaz.rivagrill.com/uploads/1/3/2/3/132302921/nezoseva-mezulawasigasek.pdf
    • http://files.marymartinembroidery.com/uploads/1/3/2/7/132740831/tipojunor_sufos_tezerilisuxig_saruxugujel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1442/1653/files/basic_electrical_electronics_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6051/0376/files/ieee_829_standard_test_design_specification_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/jalexejejajanetokuxolaka.pdf
    • https://cdn.shopify.com/s/files/1/0437/7290/3585/files/killington_snow_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/19044869130.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/19013925664.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/80437477991.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/31966035031.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004447.bin
734640de7423034080c2603578492d85ddd56a879587a8b0e804061f9c6a870c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4447 5460 bytes
font_01_sfnt_off000056a3.bin
55d27aa1496755b0a55c87f01b33dcf68cabc7bb1aa8a1f8439395417923cff9
pdf-font-stream PDF embedded font (sfnt) at offset 0x56A3 9596 bytes
font_02_sfnt_off0000777f.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 4324 bytes