Malicious PDF — malware analysis report

Static analysis result for SHA-256 75db76b094b42892…

MALICIOUS

PDF

115.5 KB Created: 2020-12-06 13:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d67e2341115417fca2607b0ea2d7e336 SHA-1: 1124c73427df7eb517a52efe3acf8f1a97c4648b SHA-256: 75db76b094b42892e172c290178a6b8fcd2c752ed401ae628e4a70ed07199092
162 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector, traffine.ru. Heuristics indicate it uses an urgency lure, common in phishing attacks. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=auto+capture+app+for+android In PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fcc231418343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_5fbab28f5bdba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc578d79698b02c7f3f914e/t/5fc7b72c3d56556d1447eab5/1606924077142/duck_hunting_gear_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0589d40-d1c4-4c66-a4ac-e2b2583b535f/saturn_factory_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/automatic_control_system.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/penuji.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/45478752469.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a954239b0722913c9654/t/5fc508cd7acac6192a5fd91a/1606748365930/minecraft_lucky_block_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712cf2c4-4f35-494c-910e-8ff44e790a8e/waranudezipus.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/puripijinakazek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc794aa849d1727bc133313/t/5fc94da24ca67815841d3832/1607028131089/20737952864.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36b9bcd1e280355e43c7b/t/5fca96c7fdef016eae86efb7/1607112393217/nuxofozijevogebagive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9ed516-0daf-43d2-8cdb-cc8f1c3ffef7/davezakolifubotut.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/rodakudadof.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/72180849653.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_off00018a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A31 4928 bytes
SHA-256: 8103513dc9b89830d3d174943eaf9f30fdadbb900e8d364a0f5373d87e6ef07b
font_01_sfnt_off00019b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B08 11220 bytes
SHA-256: 7d5430aa47628ea60931a41c672c83f64802177d299d9efe7c3bca6ab1f41d53

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