Malicious PDF — malware analysis report

Static analysis result for SHA-256 050a67419f1a42ff…

MALICIOUS

PDF

63.3 KB Created: 2020-08-09 07:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fcc923dbed9aa537616f8bab3a23a64 SHA-1: a4a95a6155810a102c9e9bad3d003401e7754b11 SHA-256: 050a67419f1a42ffc3bb7cb03f2bfd28431887e45338a8095cfbbf96508400ea
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. The primary malicious indicator is the link to 'ttraff.ru', identified as a malicious redirector. This infrastructure is likely used to funnel victims to malicious sites for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent.

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=2020+buell+firebolt+xb9r+owners+manual+pdf
    • http://files.tristatemodelers.org/uploads/1/3/0/9/130969421/jinipezorofo-navamexim-kopakovit.pdf
    • http://files.thedogbedcompany.co.uk/uploads/1/3/2/7/132712080/4071462.pdf
    • http://files.kirkplayers.org/uploads/1/3/1/8/131858661/tuzutuw-tegeladamepil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5715/9063/files/65738675197.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/tafixal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/bijevofelatit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/27971770995.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0448/3085/1233/files/atomic_structure_and_periodic_table_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/obsession_frankie_j._lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/avast_uninstall_utility.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/najejedosexedafivedem.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/biodegradable_polymers.pdf
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/zemozogurupotakebotot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/zetepixarexipes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/30151103612.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a096.bin
9ea68c38ed1526cd62784fdd5b14cd3eea5ac3d432d07f33bf8a3b6ebe81fa77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA096 5820 bytes
font_01_sfnt_off0000b456.bin
0ebdccc6f3b7d32438735ee73873738ac9596657205e76f0ea82f419208f69de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB456 11132 bytes
font_02_sfnt_off0000dab7.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB7 16060 bytes

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