Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a178ac12dad5f1…

MALICIOUS

PDF

52.0 KB Created: 2020-08-20 03:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bc166a1859d31e3f6f3de8eb319da8d SHA-1: 00683bbcda023ce4d3a67f4c693c0124e46411ad SHA-256: 67a178ac12dad5f19131451da7b784cd653c3ca9d83f0cc4c494c4ec7730425c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to benign Shopify URLs but are likely used to obscure the malicious redirector. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector as the primary attack 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.ru/pify?keyword=damanjodi+odisha+weather+report
    • http://files.caterpillarfoodplants.com/uploads/1/3/2/7/132710732/dirutagodes_dewisufowigen_toxif.pdf
    • http://files.danwickman.com/uploads/1/3/2/8/132815190/c97acde4fd1.pdf
    • http://nugun.timothysng.com/uploads/1/3/1/6/131606457/bc96a.pdf
    • http://files.thestrath.co.uk/uploads/1/3/2/6/132695478/vuduwisimo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/lipotokavuneri.pdf
    • https://cdn.shopify.com/s/files/1/0440/4002/8325/files/azure_vpn_client_failed.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/ketolobezurijanepuxosow.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/reticular_formation_meaning_psych.pdf
    • https://cdn.shopify.com/s/files/1/0433/9420/3806/files/39431510799.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/jupibexojaziben.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/restrictive_cardiomyopathy_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0450/9266/7544/files/sosedulalilesotonobiwimep.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/7191771223.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c8.bin
73517e4d333b3f52ba934e48e7a2fcf1aeee477855594eeb6178be6e501a652b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C8 5120 bytes
font_01_sfnt_off00007a18.bin
b281a7cda7e0631b4f057dccf8875cfe86e792a83c00412bb999c0147d40b4c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A18 10500 bytes
font_02_sfnt_off00009e30.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E30 16164 bytes
font_03_sfnt_off0000b345.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB345 4324 bytes

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