Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db0f4d74e24af21…

MALICIOUS

PDF

54.6 KB Created: 2020-09-12 12:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0210c595d9f0a188409363e75e1c7a37 SHA-1: a381b9ca2d6e3a431579c8512fb9caedc2bcb3b2 SHA-256: 0db0f4d74e24af21aafd4173b96f41b3d6cc0db43194c148d06e97b1299c8def
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to distribute further malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=template+ppt+keren+gratis', suggesting a lure to disguise the malicious intent. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=template+ppt+keren+gratis
    • http://files.grimousironblood.com/uploads/1/3/1/0/131070192/1450331.pdf
    • http://kozudino.mentalhiccups.com/uploads/1/3/1/4/131437605/deroripovodunek.pdf
    • http://baxukat.jennyframe.com/uploads/1/3/1/4/131438474/lunokekepemij.pdf
    • http://files.patriciajoaquimrealtor.com/uploads/1/3/1/8/131856195/relasikidow_setil.pdf
    • http://files.aluminium-extrusions.co/uploads/1/3/0/7/130739835/6545531.pdf
    • http://dokevi.uccbaycity.org/uploads/1/3/1/3/131378898/a95211a0b17e6e2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/2994dd_2515ce411b034f83b9b9c761be2f63e7.pdf
    • https://static.usrfiles.com/ugd/5cf23b_1b64883dbf8248b89e809afcefd5d260.pdf
    • https://static.usrfiles.com/ugd/b5aed9_d915e7552ad0425d8676052f0dc4b7b8.pdf
    • https://static.usrfiles.com/ugd/d1d005_9f715591590343878af282d6016583ab.pdf
    • https://static.usrfiles.com/ugd/d216cb_b5adbb0b7ba247a18945ce86ba3a7ff7.pdf
    • https://static.usrfiles.com/ugd/b8c837_73f291fefe554f6cb4345bd5383cd736.pdf
    • https://static.usrfiles.com/ugd/b6edda_47e8bbd527984ecda091404510892758.pdf
    • https://static.usrfiles.com/ugd/5a4aad_69d6d03c56a14ccc821eb9014d7f6c49.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb4d1231028042aa8fe9fca92ba0e1e0.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000986d.bin
49c25d5cc523ec8c13da90b137c8df500cdc736dbb1a2af29e6884e972688b98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x986D 5152 bytes
font_01_sfnt_off0000a9e0.bin
c9596e19206550ecfc218fc6e1631983a3c82530c2636d5f49541928f87a045c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E0 10528 bytes

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