Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67a9f6b2a33c45f…

MALICIOUS

PDF

62.3 KB Created: 2020-12-22 04:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4d43ba6cbc22d2b0cff04472dd693a25 SHA-1: d579aa863919604cee9db76029655849e33c9206 SHA-256: c67a9f6b2a33c45f8490bbe4615bf81c320e28a6ff96c0f745c82ec27ce71c50
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. ML classification and ClamAV also flagged this file as malicious. The embedded URL is likely intended to lure the user into clicking, leading to a phishing site or malware download. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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://ggtraff.ru/aws?utm_term=movie+free+kabir+singh In PDF document text
    • https://static.s123-cdn-static.com/uploads/4484995/normal_5fc44d6216921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501479/normal_5fd849a24962b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f9a687181421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446398/normal_5fb27de50473c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_5fa10943699cd.pdfIn 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/4e38c1e8-cbd8-4847-86b9-4f2b81264b65/1914_five_dollar_bill.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/vovimixorepogowu.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/definition_of_non_probability_sampling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e320beb5-81fd-407c-b827-f1d1a984abf9/ppsspp_dragon_ball_z_shin_budokai_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d9e48b-242d-4209-964b-49a77f39c17a/46793609269.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/3_huesos_que_forman_la_cadera.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/67947852405.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/android_phone_screenshot_location.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_off0000b639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB639 5264 bytes
SHA-256: 1990e137ae35238113d9006ded18500da5c9e49ce852e990af62779f3e8c9bc7
font_01_sfnt_off0000c836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC836 10576 bytes
SHA-256: 761ce9db459c29371432fc676fd0f6aba699ef374f9ec4ef769891a538e7d4e6

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