Malicious PDF — malware analysis report

Static analysis result for SHA-256 821122d5c307191b…

MALICIOUS

PDF

41.2 KB Created: 2020-08-02 12:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e01fe2ee3ac5d08d171fc7a7f5cedf SHA-1: f94c070fa65a911cb371c1305a75ee15ab56918e SHA-256: 821122d5c307191be222280860ea77d55d5e068922b60ce7dc414a56974165a6
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'Millermatic 200 manual' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection scheme designed to obscure the ultimate destination.

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/pify?keyword=millermatic+200+manual
    • http://files.simsburybasketball.com/uploads/1/3/1/4/131437276/zivirodixemuli-voretopuminus-nolinob-zujokage.pdf
    • http://files.kaelynschmidtdesign.com/uploads/1/3/2/3/132302907/6051424.pdf
    • http://files.samplucker.com/uploads/1/3/1/0/131070767/9fb79baa7426.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/9579/1518/files/72880530460.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/4458720105.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/91289963369.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/2788007595.pdf
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/mamozivikebu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/76315957277.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fiwowosilikaragufes.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/23933400087.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/90374672753.pdf
    • https://cdn.shopify.com/s/files/1/0436/9943/7721/files/67725455539.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6966/files/68043992264.pdf
    • https://cdn.shopify.com/s/files/1/0435/3694/1215/files/62410183781.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/printable_letters_for_bulletin_board.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_off00005a5e.bin
3bb73d1305475ad6ccea91711522798a5ac27df5f2ec325eb9ccfc66e9623cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5E 5044 bytes
font_01_sfnt_off00006b71.bin
0b9b005fcf0d5460d156a1196239937e6efddaad346af90e5c4a8ba49f7c20ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B71 14312 bytes

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