Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fa7381cdfb8c35…

MALICIOUS

PDF

35.1 KB Created: 2020-09-17 06:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e605cfead0ae76c83bb0e095dbb9b4b SHA-1: 40f579268245f9af1f65eaca6cbd28da05a82126 SHA-256: 73fa7381cdfb8c3574b5f16acdcbe1776ae317c71c124333d260b3ad24bcea06
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=providence+forge+hardware+phone+number'. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, some benign and some unknown, indicates a link farm strategy. The ML classifier 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.link/wix?keyword=providence+forge+hardware+phone+number
    • http://xogef.ftpiercemasons.org/uploads/1/3/0/8/130874179/fagufejelazajupafeg.pdf
    • http://zolopanas.lisapellingdietitian.com/uploads/1/3/1/4/131408738/dfb5ec78b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/poulan_weed_eater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/smash_bros_ultimate_ganondorf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8377/4614/files/68030952572.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/57595555083.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/blank_coupon_template.pdf
    • https://d8c151b3-edef-4812-b0e1-e64836d89ce4.filesusr.com/ugd/bbd3cf_122c3206a8274c6caca30ac797fc8a3a.pdf?index=true
    • https://64054d8b-ec1e-48c5-ab75-26dd581ecda5.filesusr.com/ugd/ea2c45_a0aa6213c1ac4260965dc4533022b45a.pdf?index=true
    • https://841d6977-9acc-4204-bd32-213ee8bc3f23.filesusr.com/ugd/93971e_ed581153316241d99214df5b1b545374.pdf?index=true
    • https://f49bddb7-8fa6-4a14-976d-cfcb9dd9e7de.filesusr.com/ugd/8f6098_11695f4dd6784cea9917dd9e279a245a.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/41789803245.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_off00004805.bin
6428a9aeafe1d0b280dd75425c8393f48d8e53978010f2b0197cc1320440bde1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4805 5652 bytes
font_01_sfnt_off00005b2d.bin
b1dccf7390def9a3daf8216a7b1818acc0a530259eef883fbc3d757b35a36760
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2D 10716 bytes