Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e0af6b446dc883…

MALICIOUS

PDF

48.2 KB Created: 2020-08-23 05:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 273095dd487725d3855effcddb7ebdbd SHA-1: 0c8651df82119c32bc157951f86533fde3c4c389 SHA-256: 64e0af6b446dc88386f8dd37308a9f4d55da9ed9bf0682773531a5a483aee533
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 manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to arcade games and Stardew Valley, likely serving as a lure. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to potentially malicious content.

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=best+arcade+games+for+android+2013
    • http://files.flbutterflyeffectboutique.com/uploads/1/3/1/3/131383864/fegomosoje.pdf
    • http://mejasu.reviveav.com/uploads/1/3/2/7/132740718/repudedipixip.pdf
    • http://files.micromemphis.com/uploads/1/3/1/8/131872021/jiruxen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/mushrooms_or_fruit_bats_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0437/0461/5066/files/63567587410.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/58919694353.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/51027108163.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75278808376.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/dimetoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/1068/6113/files/33328397035.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/92559636041.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/41101337748.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/apomixis_and_polyembryony.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32343356061.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_off00007c54.bin
de208ede2bc2a021e93fc2ed31c0cf7c86113ac5ffb42c4a98f88948d5cf260b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C54 5848 bytes
font_01_sfnt_off00009028.bin
a482ee8d7025c3d2c9baf8efebde0b0bbd8083111cf9c890e421fc449d145eb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9028 10628 bytes