Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ab070e2733f681…

MALICIOUS

PDF

68.0 KB Created: 2020-11-21 22:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 13fc0b85f1ddffcc32f3c6b4cd746963 SHA-1: 16eaf1e48ff2e742019c2e403dadd550f9f059a2 SHA-256: 39ab070e2733f6811fa5c1fd47876f8dab6750c6c91cde3618f838a2bc542f34
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'gettraff.ru', which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'Hp smart printer app for android', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/aws?utm_term=hp+smart+printer+app+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f908519cad10.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/664337f2-0f6e-4b26-b4f6-7fb9b8ea0366/46590200473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78737a16-d296-47ee-9586-3d77cf3398df/ageless_male_class_action_lawsuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ce4e94-7020-4190-9433-86b18f2b5614/10279845549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f396e29-e84e-4d09-b450-18f5008e1408/bobcat_743_skid_steer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501ae9d9-f46a-45d7-bbf4-3e29b27e3db8/zuwumej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e85a7a-8e98-40ae-9fa6-58f0677817b0/musician_s_friend_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947494ce-c79e-4cb5-8e26-192f3ceaca52/48971528572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f0b7dd8-a4b1-4402-ad62-883f72776fe6/zirimekuxorewufij.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/zunemoxonekawopekazemow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6497888b-e05b-4e35-8646-42f59093cc72/foxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be47c5b8-a2f7-4a97-b888-21fe61691e37/32000551202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4488c0a9-a016-49a1-8ab1-53e6838d62dd/57123350363.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/54929621076.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/18037116808.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/law_officers_pocket_manual.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_off0000ce54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE54 5116 bytes
SHA-256: 76fb0925e11f4252db62c643483ad8c24eab18d225eb0e49166b21c92c7a58f9
font_01_sfnt_off0000dfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 10416 bytes
SHA-256: f7fdd32b694c20a19d397e148c9d34600a8a5d5d9a83bc3cba0a83deb111c2e3

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