Malicious PDF — malware analysis report

Static analysis result for SHA-256 8205887f972a04f0…

MALICIOUS

PDF

39.5 KB Created: 2020-07-08 19:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c8dc9bca456adb7c4ca62c5d1f6d053 SHA-1: f31aa7812ca19fb80cedc48af66764f1d6326ea8 SHA-256: 8205887f972a04f044c83909c070c1e5171725ba46a4ef9f31ad225354a1289b
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a 'word to pdf converter online' lure, directing users to malicious redirector infrastructure. The embedded URLs and the primary redirector URL indicate a phishing or scam attempt. No scripts were extracted, but the presence of numerous external links suggests a watering hole or SEO poisoning attack.

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.com/wb?keyword=m%20s%20word%20to%20pdf%20converter%20online
    • http://files.mrbsfinest.com/uploads/1/3/2/3/132303080/wozesepivijiwox.pdf
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • http://files.afsanehtorabi.com/uploads/1/3/0/8/130814342/5224489.pdf
    • http://files.agorapublications.net/uploads/1/3/2/6/132682570/4da5af8.pdf
    • http://files.internationalfishers.com/uploads/1/3/1/1/131163705/wedigikusitukuxovaj.pdf
    • http://files.notesmove.com/uploads/1/3/0/8/130874265/fiwesipav_xadixixulir_jomudobejilusu.pdf
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdf
    • http://files.hallielee.com/uploads/1/3/2/8/132815961/5788720.pdf
    • http://files.simplydivinesuds.com/uploads/1/3/1/4/131407812/23f3d849.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://razopote.files.wordpress.com/2020/06/rikirepowejepadono.pdf
    • https://tizakifu.files.wordpress.com/2020/06/5210325868.pdf
    • https://regowom.files.wordpress.com/2020/07/71898867384.pdf
    • https://penazubi.files.wordpress.com/2020/06/kawavepuxomibofezi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81159011373.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dec.bin
641323351a195dcdb2ea62c25eafc6025d04e4d44dc0feced01bc393d6c534ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEC 4884 bytes
font_01_sfnt_off00006eb4.bin
d485dfe4c71f0f958f6b28a2a478d4ca56f7dfd315233044d76f2aa3f41c2925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 9984 bytes

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