Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ffdb526faf90be…

MALICIOUS

PDF

73.4 KB Created: 2020-11-22 03:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ec0b040339b571fe1ac42b8dda5ddb59 SHA-1: 14f7b69e1c5315fb8b31f8455b2f00ee06f60de5 SHA-256: 07ffdb526faf90beb7da2f6277865d31f57cc1cde08a61ff089fe051cce1c984
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it's a malicious redirector and part of a link farm, with one critical heuristic flagging it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'grease script book' and invoice/payment lures. The primary malicious URL identified is 'https://gettraff.ru/123?utm_term=grease+script+book', which likely serves as a redirector to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gettraff.ru/123?utm_term=grease+script+book In PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/34cfde2527b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f966b8bd22c7.pdfIn PDF document text
    • https://xuguzopagar.weebly.com/uploads/1/3/4/4/134490213/nemazenimu-kewanosinite-bujibene-gomalapagakaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5f93389eee605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_5f915c3b16af6.pdfIn PDF document text
    • https://babunugigexi.weebly.com/uploads/1/3/4/5/134582988/e1aa91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/subud/subwoofer_amplifier_circuit_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/ziering_and_weiss.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/78034096889.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/defensa_siciliana_dragon_acelerado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c347ed2-cd9c-4f54-9dd2-efa228cf115a/lejizutataxisalikojopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f149988e-b84f-4ec7-9760-a3f4f7e0e5f4/88670094678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc0e339-b7ad-4a3e-bad0-408b64507253/plan_to_eradicate_the_saiyans_1993.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD451 4812 bytes
SHA-256: e4798b446dcb43df886b2190eb5397f1d27be653eefcbed307fc6537bf0b02ed
font_01_sfnt_off0000e4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BB 11272 bytes
SHA-256: 82aaae115436a1dae95fe42a49add6141b9e6d1f17854c60c1f2154cafb47cfe
font_02_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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