Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b59d5b538082d29…

MALICIOUS

PDF

41.2 KB Created: 2020-11-09 15:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e85c7751772f445079a430f7475fb0a3 SHA-1: ebc6a2cf4280e482a0054fa8bbda5388520e30c8 SHA-256: 9b59d5b538082d291c2fa0bcde1956582b58ff7f6b7a66246038e5f4b8f09b71
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded external links, indicative of a link farm or SEO manipulation tactic. The primary URL, https://trafficel.ru/aws?keyword=canon+sureshot+sx620, suggests a potential lure for users searching for specific products. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?keyword=canon+sureshot+sx620 PDF link annotation
    • https://devigumekumowir.weebly.com/uploads/1/3/4/3/134394761/dd246c05fe2d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_5fa5c414a2034.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/779690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fa838b8ba0d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_5f945fd6ee9b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/tupopakanuxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3686d947-ec06-4cec-b060-05a99ee0f841/88891509590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd99eec-82bc-4944-ae6c-7c9b62014698/takov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a6de85-16eb-442f-8cba-a33c9819b906/american_history_reading_comprehensi.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/mark_hanby_sermons.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/anoestrus_in_cattle.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/suvakidagitinufidi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6108 5140 bytes
SHA-256: 9126ba27744a49fb6434860cc76aafdd68d9e00c01ab4cbacc20b861f0da037a
font_01_sfnt_off0000727c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 11476 bytes
SHA-256: 2c22649c1dbb45a1d4507a78994864f71876ec57f0a90ba9e86d734f93ad8955