Malicious PDF — malware analysis report

Static analysis result for SHA-256 1679a614f40f2c70…

MALICIOUS

PDF

80.7 KB Created: 2020-12-08 23:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b9e6e514df7ac162bbcc9b8dff490e79 SHA-1: 56de65a618b0cde9f26b8299370389fde53e0343 SHA-256: 1679a614f40f2c70b73e5c2ae6200d539fe90935ab497db908404836f0b9e2c5
154 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 traffking.ru. This indicates the document is designed to lure users to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffking.ru/123?utm_term=vicks+v750+cleaning In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd33135e-3f19-41be-bb79-b4fd13f5ccb9/army_hipaa_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a548f978-7191-4713-a9b1-22ebde86741b/tamisatugiwalome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ddb5d69-e556-4e8c-812e-6f149c13a912/balobibavepeno.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eab716f6d44b07bedc8b/t/5fc67092cb3e0f57712df87f/1606840467843/fexudaxer.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/what_is_meant_by_barriers_to_effective_communication.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2fc6c23b2b0938fbd7ef/1606234069654/interpret_division_with_fractions_lesson_8.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d306450-ccb3-4971-851f-7411337e5c5a/3700402510.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5c5ef8cdb769c6da48bb/1606376543269/roland_barthes_camera_lucida_trke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7dd858-f894-48d1-b2db-29f8cdd31e07/the_game_by_neil_strauss_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10f0fab79f442f22a8155/t/5fc135547acac6192aec9a6e/1606497620546/biochemistry_berg_6th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc286186609fd0ee79bb78a/t/5fca4be4e4017829c1781180/1607093221133/jordan_11_snakeskin_grey.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d05c403f5353fdaeb827/t/5fc5c97f5147b14804fb20a3/1606797696340/hermie_and_friends.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B3 5308 bytes
SHA-256: 481d8cea639735857d85e1dc78611c74047e3e0b9d1f417e1d3e5154f00b0ca7
font_01_sfnt_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 11092 bytes
SHA-256: 4492ba9df7279e8df986f065d15595ca72734ab06937346f371201ee7dc33a4e
font_02_sfnt_off00011fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD7 16332 bytes
SHA-256: 91c92fab729f552433758475f1ecf6a366c66c74ae6b4dd9e31a9a0100f2b42c

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