Malicious PDF — malware analysis report

Static analysis result for SHA-256 075c93f5ab8b182f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-03 22:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40d28732ed588c4dcf11326c70068575 SHA-1: d7a37812928771e995d2039440e609f3de3d8a68 SHA-256: 075c93f5ab8b182fd61f7bab096e37a20bff98841f40af04518a75f6347ac676
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, creating a link farm. One of the primary links redirects to 'https://ttraff.cc/pify?keyword=augustine+confessions+book+3+pdf', indicating a malicious redirector designed to lead users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=augustine+confessions+book+3+pdf
    • http://files.summeracappella.com/uploads/1/3/1/1/131164250/475870c4fe.pdf
    • http://files.kyladiego.com/uploads/1/3/2/3/132303229/pofur.pdf
    • http://files.g99photography.co.uk/uploads/1/3/0/8/130813985/tinorazoxuji.pdf
    • http://files.littlefollowersdaycare.com/uploads/1/3/1/8/131871642/fivurogefeziporapat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7923/6773/files/25161878828.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/saints_row_3_cheats_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/bukiwelokiwiwiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2119/files/dekigafasabipuzuwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0498/files/81920880415.pdf
    • https://cdn.shopify.com/s/files/1/0437/0667/9447/files/nezenegumujokatibabubexe.pdf
    • https://cdn.shopify.com/s/files/1/0438/4168/3618/files/dugogadevafabife.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/denemulufimepamunijavuduj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/76473384991.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/83886838097.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/97890470894.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/jowajulatadefu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2744/5398/files/88472878599.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_off00006558.bin
f9b5c198a20c38135810115be65c9fa698ffa2f955ff21013b68a6a6f06a956e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 5340 bytes
font_01_sfnt_off000077a8.bin
2cd7c93afa60d972a8bd1e75f1f940bbf71b415095ded214662df4b151911af8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 9812 bytes

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