Malicious PDF — malware analysis report

Static analysis result for SHA-256 3095cd6cf2315d36…

MALICIOUS

PDF

81.7 KB Created: 2020-12-17 09:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6962398e8eb79ee47254487264d03611 SHA-1: ba2086a86e730ea9e00dfb917bcf4c4433e9610c SHA-256: 3095cd6cf2315d360783e364fd24fbaca6c2f6be070db1c15978f9e67f9c6f87
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 'traffine.ru'. ML classification also strongly indicates maliciousness. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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=que+es+algoritmo In 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://static1.squarespace.com/static/5fc56d0fea4a794d56639523/t/5fcda78e33187724c40e3a22/1607313302018/pewiporatamito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0226587e-3675-4bf5-80f5-7d4536fb6c09/formula_of_hydrate_lab_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e93a7e-82fb-4fc6-be59-86d9b5a69a76/contabilidad_basica.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57c39a3bf4b14abc81ab8/t/5fce64a274a40730fbcd1c5b/1607361698295/fake_cracked_screen_wallpaper_prank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098bcdbd-e368-4d30-9f0d-39cc2b4349d9/lafogunedelijigina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5635a5c1-1d45-4ca9-85c1-b8cd71ba0666/80570950556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a99bdf-0db0-458a-bb4d-cc0c6bde7562/five_minds_for_the_future_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582f00b5-3357-468d-9e47-7767768f300a/92581941338.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcee02b30a95049ee079bfe/t/5fd6b6ffd654060362d50df6/1607907071823/background_for_picsart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf25bd8f-d9ae-493d-a571-1efafca9bd99/word_that_start_with_vit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5645cb3e0f577146665e/1606374982499/san_antonio_high_school_petaluma_ca.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_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 4844 bytes
SHA-256: 443dff4bd2f6434214388e78222885a0fbec328259a0ac6c0441274aa48bbf13
font_01_sfnt_off00010814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 11264 bytes
SHA-256: cf20f16bdea592ef70ed844235a6adea2677ab7b44fc3e79b34939eeb2c90ee5
font_02_sfnt_off00012c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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