Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e923af62600674…

MALICIOUS

PDF

42.3 KB Created: 2020-08-08 15:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e751d4a189ff6f0236c45a80ad319880 SHA-1: fd9b9c1bbb3f903ec6efd49baa6146d09339cda7 SHA-256: 74e923af62600674edeb216aea3180d6f3676d4e63f587d16e306f494e81ed87
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a redirector link to 'https://ttraff.ru/wb?keyword=alasdair%20macintyre%20after%20virtue%20pdf'. This suggests the document is part of a link farm or SEO poisoning campaign designed to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious redirector links is sufficient to infer 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.ru/wb?keyword=alasdair%20macintyre%20after%20virtue%20pdf
    • http://bodesituf.vsincart.com/uploads/1/3/0/7/130739379/kajibezivetores.pdf
    • http://files.apriest.com.au/uploads/1/3/1/4/131437864/lidamopaginugawez.pdf
    • http://ridojino.pamensgymnastics.com/uploads/1/3/0/7/130776757/xukoxitesuk.pdf
    • http://files.tngeographicalliance.org/uploads/1/3/0/9/130968988/gexun_daraxix_kejukexava_kojiruvosexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/767904014.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/outline_map_of_africa_with_countries.pdf
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/gibozukejiwezivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2981/files/zixejibobufiborikagen.pdf
    • https://cdn.shopify.com/s/files/1/0448/0896/2210/files/speed_phonics_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/zudobujekuvofebemogetal.pdf
    • https://cdn.shopify.com/s/files/1/0431/1770/7425/files/13811318584.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/pujakelajekasogelurepoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/45276421179.pdf
    • https://cdn.shopify.com/s/files/1/0436/2849/5001/files/2016_nissan_rogue_owner_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/55309046915.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_off0000679a.bin
cd170843222b58f4dd0ccade2e29e0294691c1b58db7428824cd077e8c17d4bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679A 5452 bytes
font_01_sfnt_off00007a21.bin
c1c382daabca9472811c4b93bd10bee6305a499c6ede19a8b42e3eb49ea4c6f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A21 9972 bytes

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