Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4642e157a2bdc7…

MALICIOUS

PDF

35.3 KB Created: 2020-08-21 18:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 236c34b2f6c55241caf759c966215b7c SHA-1: 2af12c0c1682af8a4876b03184e0ad1ad25eebf9 SHA-256: 2d4642e157a2bdc7f999499189916c84361a8528d283af20c78eb42cd1a77a5d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to free audio songs. This indicates a phishing or social engineering attempt to direct the user to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ttraff.com/pify?keyword=petta+audio+songs+free++mp4
    • http://files.ilfcbshop.com/uploads/1/3/1/6/131607075/1752cb6.pdf
    • http://savika.trixielizard.com/uploads/1/3/0/8/130814168/nesijimomexij_dujosabaro_kuremajoka_juwawatepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/fibovapevese.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/crak_photo_shop.pdf
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/oxford_phonics_world_teacher_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/kotedaxukejexadozotudox.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/79764698234.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6361/files/chakithaya_song_video_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0447/9628/0993/files/network_marketing_books.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d2b.bin
ca999da6325aab363c144968fa706c892b5b484d1196ee6eaa54816599463e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2B 5416 bytes
font_01_sfnt_off00005f85.bin
48898d6424437af6c780e046ec60695c736a15383bab3e9f34a3d0d546029a2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F85 9852 bytes

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