Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddf4cdb263cd178…

MALICIOUS

PDF

69.2 KB Created: 2020-11-11 14:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b573359c80edccf37d07ae3143f39dc2 SHA-1: d99f71d7ce3ea3e49dc69fff66c240572db36ecf SHA-256: 2ddf4cdb263cd17837dbc4c7398ac4e3721d7ac2dbbe12fb4ca95ee7b8158ee2
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'traffmen.ru'. Additionally, it features a PDF link farm heuristic, indicating a large number of outbound links, with one pointing to 's3.amazonaws.com/tomamujuf/charleston_bus_depot_staten_island.pdf'. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://traffmen.ru/strik?keyword=maytag+neptune+washer+troubleshooting+guide In PDF document text
    • https://rutukosawokiw.weebly.com/uploads/1/3/4/3/134318214/3038416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5fa4876cbe2b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_5fa8b9552fadf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5faa15094be9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f95d2ae94b66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_5f8ed0858ed3c.pdfIn PDF document text
    • https://rixapozati.weebly.com/uploads/1/3/4/4/134456921/tujolarew-janebuzewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_5fa89aee05090.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/tomamujuf/charleston_bus_depot_staten_island.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/ads1115_arduino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6479dbe-8141-4753-8d21-a954a2017269/36683691577.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/how_to_make_amends_with_someone.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/pathfinder_piwerful_wizard_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/iannone_last_name.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_off0000d1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AD 5560 bytes
SHA-256: 2a5cb8f6aae6c1f7f6a03e865ab82b6dc70a4b600e650810f240262588706639
font_01_sfnt_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 10296 bytes
SHA-256: 9cc7189acf9d0550b21d5d466ed3ec904e9ea6d9f7a3e735683b3c3a7b9bf8b5

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