Malicious PDF — malware analysis report

Static analysis result for SHA-256 668829260809419b…

MALICIOUS

PDF

53.2 KB Created: 2020-07-28 01:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba98964306a3b452fd21f60abdf09eac SHA-1: 337b31f0c6257e497817dd8435cfd91ba677d1ee SHA-256: 668829260809419bcb664ab7426eb85f57a5cb25f7244eea8d8fbd43a028fa9f
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO abuse. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', indicating a potential distribution or phishing vector. The ML classifier also strongly flagged this PDF as malicious.

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=baldi+mods+android
    • http://files.brittabelle.com/uploads/1/3/1/8/131871424/mexidejemefuf-vujixufa.pdf
    • http://files.mayfairreinvestments.com/uploads/1/3/1/0/131070230/labugopowukij.pdf
    • http://files.increaseyourbrainability.net/uploads/1/3/1/8/131859895/e4dce298e2d5.pdf
    • http://files.saintlouisspeed.com/uploads/1/3/1/0/131071082/2727101.pdf
    • http://files.mtnmistaussies.com/uploads/1/3/0/8/130813783/9460336.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/90017495042.pdf
    • https://cdn.shopify.com/s/files/1/0437/5475/0106/files/sufagudavovirotole.pdf
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/guzakigexoziv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/tazurazumevus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9476/9821/files/59748319354.pdf
    • https://cdn.shopify.com/s/files/1/0435/5555/3443/files/fizuvunapitupuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/39557134920.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/temuga.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/lavoduxesasikusuxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/57552864637.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3166/files/4804977072.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_off00007da7.bin
530a8ecb4e12fe6948cc8937fe09f7105f4f109d6af99765d9dabfe90794ab1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA7 4612 bytes
font_01_sfnt_off00008d17.bin
49bfe97468080857cba530f9144c5ba02d8fa4f59850a7d7998163fd8748fbe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D17 10804 bytes
font_02_sfnt_off0000b160.bin
2a247a753e8a01f70d7fcfa74e2d7baad7259a755652018209d99d19020bd12c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB160 16332 bytes

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