Malicious PDF — malware analysis report

Static analysis result for SHA-256 035693afd123748c…

MALICIOUS

PDF

113.0 KB Created: 2020-08-06 14:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6630b2a31979e3d0586dd58b8ddf22d SHA-1: 662a3cd3b05d6b35148a9dd6762a71583ecdcdb4 SHA-256: 035693afd123748c91ecaa00dbe9d4745a6ab97d25c5fe86d49ade4ef7d4cc40
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to external PDFs, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to disguise the ultimate destination. The document body, though heavily obfuscated, contains the same malicious URL, indicating an attempt to trick users into clicking it for a purported 'Akira Kurosawa book pdf'. No scripts were extracted, but the presence of malicious redirectors and a large number of external links strongly suggests a phishing or malware distribution attempt.

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=akira+kurosawa+book+pdf
    • http://guwel.kwhitewc.com/uploads/1/3/0/7/130775823/5204515.pdf
    • http://files.erdyl.com/uploads/1/3/1/4/131437074/8010484.pdf
    • http://files.darkeststargames.com/uploads/1/3/1/4/131406173/tovavekel_talugutanin_xupifofipuwil_zalaxibu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/xageluvas.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/womorovuvomidux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4279/8757/files/93086734082.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/coleman_powermate_parts.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4399/files/gate_2020_syllabus_for_electrical_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93867881616.pdf
    • https://cdn.shopify.com/s/files/1/0437/9607/0560/files/rejuxosenowod.pdf
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/mexuwebavoposuligudon.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2675/files/blood_angels_8th_edition_codex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/sosesuwipurafazame.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/naga_sadows_midichlorian_count.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/vizariwoluzexumiteva.pdf
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/4235585909.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_off0001716e.bin
b5d35263e808004c65fc0b815a316ea5a6125f5bfb9f7e0b8bf56aff7cb7df6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1716E 4340 bytes
font_01_sfnt_off0001805a.bin
735df74a9353b62989974af029b4c13e2dfa7797245bd14140195b4f4996e7e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1805A 5288 bytes
font_02_sfnt_off00019275.bin
f560c7028b148a4cc417e7658dc9767df55f2aec229ca061dde958a0ecac7b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19275 10408 bytes

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