Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2b37db221f1dcb…

MALICIOUS

PDF

59.0 KB Created: 2020-12-26 15:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 26146125699b90c34adb2d5ce83e0886 SHA-1: 19830717906492bd127630067fac1fea638825f8 SHA-256: ab2b37db221f1dcb0c2d18ddc60530705fad67ff126624350e4678177dcb4076
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 'traffmen.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 secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=metallic+rainbow+iron+on+vinyl In PDF document text
    • https://cdn.sqhk.co/nopawuwam/fX613hg/heart_pronunciation_ipa.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/bKngiji/jasazubuviguvuxax.pdfIn PDF document text
    • https://cdn.sqhk.co/zumiredosuwi/Tgeidib/guess_the_picture_quiz_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/ifge9gj/slice_of_heaven_pizza_menu.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/fixararololu/bubavuvadajupifuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a6b6c6-5856-47c4-a08f-e928b40d7b65/runescape_dungeoneering_power_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3ef278-7712-4bcd-aed9-f31c21d05efc/red_persimmon_nails_beaumont_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/anecdotal_notes_template.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/a_c_p_full_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497d7017-16b8-4684-bf93-3f39aa9f3f0f/10736096424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237ca22e-637d-4541-91cd-ff0981cde0a0/dawufaxoku.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/rijutugi.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_off0000ac87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC87 5016 bytes
SHA-256: 625f65656687f3a1fa9489e8818d6db5ebe8271edce8428d917574155b974a15
font_01_sfnt_off0000bdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCE 9912 bytes
SHA-256: 3038906e1b224f1b205e448d784c80858fcb8b3a02d835b072fd52b7182c8d8d

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