Malicious PDF — malware analysis report

Static analysis result for SHA-256 7648df14c028315a…

MALICIOUS

PDF

42.2 KB Created: 2020-09-03 05:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17762048de1443f215efcbc1341ea1c3 SHA-1: 7b0143c0a75c83fb4fbd169938e39f8284568818 SHA-256: 7648df14c028315a29fc9d91ca2dbb0b7325ecbfa2c46f3c98dcd3f8d1621d91
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a Honeywell heater thermostat manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic shows the document is part of a link farm, likely for SEO manipulation or to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.me/pify?keyword=honeywell+heater+thermostat+manual
    • https://cdn.shopify.com/s/files/1/0434/2484/1890/files/nodelozaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1288/1564/files/lasimamedozafole.pdf
    • https://cdn.shopify.com/s/files/1/0439/4886/7742/files/pisciculture_en_bac_hors_sol.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/kfc_job_application_online_form_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/blood_money_ringtone_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/centro_virtual_cervantes_generos_discursivos.pdf
    • https://cdn.shopify.com/s/files/1/0461/9760/4502/files/66276586696.pdf
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/battle_of_the_mind_joyce_meyer.pdf
    • https://cdn.shopify.com/s/files/1/0437/9380/9557/files/continuous_improvement_plan_template_doc.pdf
    • https://static.usrfiles.com/ugd/e80f4c_2a46fe576dd2456a8da0ab94bfd706a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17f5444ee2445dbbd3d9962f5a52bed.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/28445546630.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/encyclopdie_mdicale_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/xanerupumipalawimodofefup.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006780.bin
0df06168535a04d0ba0089e6cefe0df14387e7dd52d2eba013481bbb06135b8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6780 5080 bytes
font_01_sfnt_off000078ac.bin
c466c15f0659626544db70f6acf4f314e6f1779d390fce948b73a3d8a43bd90a
pdf-font-stream PDF embedded font (sfnt) at offset 0x78AC 10376 bytes