Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd41efa9e583a3b0…

MALICIOUS

PDF

73.8 KB Created: 2020-12-26 03:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1d7aa94a870ef6f0fd69a76a1f512165 SHA-1: e69a1bb841d5316f4163a3c843d012bf370c4413 SHA-256: bd41efa9e583a3b091f3ef674c8e706a0b1c81ac12b4b335c126c863279a91df
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. One of the primary links directs to 'traffine.ru', a known malicious redirector, and another points to a PDF hosted on a Weebly subdomain, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support its malicious nature.

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://traffine.ru/123?utm_term=tea+tv+apk In PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/9377631.pdfIn PDF document text
    • https://sefokasezasun.weebly.com/uploads/1/3/4/6/134690402/b18bbbd5.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/jubovilovasil-rivimiwo.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/8003111.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/9d0bc5724d0c.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/fowonaxul/free_powerpoint_infographic_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/81897174561.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/how_to_convert_bcd_to_hex_manually.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/54193260264.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/ryobi_table_saw_manual_bts10.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/46288290859.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/zivisuroxoguxodajix.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/jinja_template_filename.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/dryer_sheet_stains_on_clothes.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/thick_description_anthropology.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_off0000e2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 4580 bytes
SHA-256: 83a9f1c12a817705c85d40b310e7bba9138ef1d2dca88eb522ea1d35c18e3087
font_01_sfnt_off0000f27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 11720 bytes
SHA-256: d41277e3a2031d544e3862a4b191735f141b1c64e3b6f803cef26a93a112b3f5

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