Malicious PDF — malware analysis report

Static analysis result for SHA-256 3495ad1a6e17e8dd…

MALICIOUS

PDF

78.2 KB Created: 2020-11-26 02:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d60d9daf6627cbb8787f960a20dd1b26 SHA-1: 267d7647aa316431333cec6492b58699ec19fc39 SHA-256: 3495ad1a6e17e8dd4e8df9b4a0047cb5f2a507791899f942d3acee2dd7fc3234
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ggtraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous external links, one of which points to a benign S3 bucket. The ML classifier strongly indicates maliciousness, and ClamAV also detected it as a phishing trojan. The embedded document body, though heavily garbled, contains text fragments related to 'liespotting' and download links, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=liespotting+portugu%25C3%25AAs+pdf+download In PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/f19344e2ed5a.pdfIn PDF document text
    • https://basubuliwude.weebly.com/uploads/1/3/4/7/134729102/248878.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/ed66499a7cc.pdfIn PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/4abdc26250fc54.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/damevusom/arizonian_silver_edition_iii_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/laravel_boilerplate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/jususawo.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/29553758486.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/anabolisme_lipid.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/bantugan_epic_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98d5399-729b-4d69-808f-9b59ba309e29/vakopov.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/visanitinoxov.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/vesdura_vinyl_planks_retailers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92121c46-9285-4311-b7e2-11a5bad3c490/papas_mia_taco_game.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_off0000f521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF521 5392 bytes
SHA-256: 1f35720ce2df2f0ba1608ffb90e2ffad554ffafe329109112fb4e5dc11706bb0
font_01_sfnt_off0001075a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075A 10068 bytes
SHA-256: 0070ec40ef3f9b5d83fa1f6207c10caac97f93cd3faa1757786ba5fb04d757e0

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