Malicious PDF — malware analysis report

Static analysis result for SHA-256 170b2f82d6cb4caf…

MALICIOUS

PDF

55.4 KB Created: 2020-08-19 21:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a06d9f4e48dff019a28143ed13f257c1 SHA-1: 50a35cb15aea2fa4b32ea2fcf0615f58a247d161 SHA-256: 170b2f82d6cb4caf8f07ae7cc6702f4c2e1554ecf8671b477a567bf89e41ce42
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. This suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further malicious content.

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=blended+words+pdf
    • http://zufepe.theshabbynest.com/uploads/1/3/1/4/131453284/8a1f2b64.pdf
    • http://gebolubor.capeannbiblechurch.org/uploads/1/3/1/4/131412955/minixo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0690/8826/files/gikiwipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/18074130031.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/geparudufexesaxetowutig.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8613/files/bobcat_parts_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/302759344.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/lifasedisafukuwusumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/pewabumet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/mavivan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30347825404.pdf
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/chromium_portable_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0437/8158/7095/files/felarod.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3215/files/triceps_workout_routine.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008041.bin
e57502f40dc66ef74d856f629ff5eeaa08922763c36822f888e66affdea1f606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8041 3340 bytes
font_01_sfnt_off00008c3d.bin
ef7ff255f0e6752af39579b3030e8f88fe8c73ba6940570e8c5fd00063645f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3D 4964 bytes
font_02_sfnt_off00009d42.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D42 1800 bytes
font_03_sfnt_off0000a5d0.bin
53a3aa66e41d476cd248d1c601bd7c891049f7df58ae49c1fe2a45d3efaa5644		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D0 12544 bytes

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