Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a679fa13e7be404…

MALICIOUS

PDF

38.4 KB Created: 2020-08-11 05:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19c795c982d53b371663d965b0952874 SHA-1: e4b7436d594c697f100776586523884c7075961c SHA-256: 6a679fa13e7be40437f52ca5ee73086a8c4b275a672a5c0b1f082e757addb59c
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 pointing to external PDF files, suggesting a link farm or redirection scheme. One prominent URL, 'https://ttraff.cc/pify?keyword=bathilda+bagshot+book+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, indicating an attempt to trick users into navigating to malicious content. No scripts were extracted, but the overall structure and URL reputation strongly suggest 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.cc/pify?keyword=bathilda+bagshot+book+pdf
    • http://siguzogox.psychictara.com/uploads/1/3/1/4/131408849/volulikekejafumi.pdf
    • http://files.travelingsauna.com/uploads/1/3/0/8/130813357/zowug_xonobatisobarov.pdf
    • http://files.murray-company.com/uploads/1/3/1/0/131070452/jilumirim.pdf
    • http://files.debbiebonello.com/uploads/1/3/0/7/130775032/rupokifa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/rogiloxagirasakopowugurel.pdf
    • https://cdn.shopify.com/s/files/1/0445/6821/5716/files/halo_graphic_novel_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/2747784762.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/12544115809.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/finologilovoxawiranox.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6982/files/the_taste_of_ink.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6455/files/marx_trains_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/kirk_franklin_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/gonobajigiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/astyanax_mexicanus.pdf
    • https://cdn.shopify.com/s/files/1/0435/3097/7431/files/26334400796.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_off00005893.bin
990ac2cb9c48f05b98571afc1c3285bf6d9523f087520cb8cf6730b46c989d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5893 5460 bytes
font_01_sfnt_off00006b1e.bin
4124ac240247cbaff3421f1e58b8ba5620632fcc41cfb324fb0bfe1771811844		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1E 9944 bytes

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