Malicious PDF — malware analysis report

Static analysis result for SHA-256 34562e8694cac303…

MALICIOUS

PDF

53.5 KB Created: 2020-08-18 16:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce4f62a3a8f292bc3f7ea607e136c23a SHA-1: 859987b4acff626cdc9834d15be23a54cf2303ca SHA-256: 34562e8694cac30385f0548898b49489de908b9b123ca031b37964b2672976f1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including a critical redirector link to 'ttraff.cc', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking file names, likely intended to deceive the user into clicking. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards a phishing or malware distribution vector.

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=climbing+rope+knots+guide
    • http://files.followyernosebbq.com/uploads/1/3/1/6/131606027/butolozip.pdf
    • http://vinonuf.childrensartstudio.biz/uploads/1/3/1/4/131482975/pevogevasipib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/standard_employment_contract.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/bal_ganesh_2_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/abstract_test_practice.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/32369976474.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/73587680839.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/bible_study_guide_ephesians_5.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/23831614985.pdf
    • https://cdn.shopify.com/s/files/1/0427/7790/3263/files/timunadixuzuwid.pdf
    • https://cdn.shopify.com/s/files/1/0447/3847/8229/files/additive_manufacturing_technologies_2nd.pdf
    • https://cdn.shopify.com/s/files/1/0452/3307/8429/files/78522291719.pdf
    • https://cdn.shopify.com/s/files/1/0440/1253/5958/files/mokaxureratizixomin.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f86.bin
33ab4ac46e8caac1b60ecdb5cefe3cec885008b48d008799d6050d098e69daf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F86 5180 bytes
font_01_sfnt_off000090f8.bin
5d72a78d1d54de89faccb4192af6027f0f96cdf28ec61985d5b67bc892df4e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90F8 10160 bytes
font_02_sfnt_off0000b3e9.bin
988a316f543fb787c6e548b45acc8bfd59cad13da049e9ddbad57dfbfbb9e7cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E9 16120 bytes

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