Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b067fdcdfe1bc6…

MALICIOUS

PDF

44.1 KB Created: 2020-07-27 15:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f92701d93c4eb25a71fe04491d78e02 SHA-1: 34b70828f14aed8920b4ad8bdd845c99ef4c49b3 SHA-256: 11b067fdcdfe1bc6ad694aee486cbc874129fd85b03da45644d5692944775a72
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 redirector infrastructure. The primary malicious URL identified is ttraff.com, which is known for malicious redirection. The document's structure suggests it is part of a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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/pify?keyword=christmas+trumpet+sheet+music+free+printable
    • http://files.thejungleygk.com/uploads/1/3/0/7/130739860/460697.pdf
    • http://files.theblockarcadeballarat.com.au/uploads/1/3/0/7/130739375/doloxafo-zomajutotexem-diboxo.pdf
    • http://files.kathrynmweller.com/uploads/1/3/1/4/131437123/vagutufijufinido.pdf
    • http://files.alexiswarthen.com/uploads/1/3/0/8/130874691/vozub-pateguj-gamopuremiwak-tugidekokekazaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/kegufaxosagubenogebodexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/voduxetelene.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/71714074233.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/84049194379.pdf
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/piserafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2911/files/fadezud.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/30165618722.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/menitozelituputo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/wovojibesojo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/13637630801.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/85955479011.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.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_off00006c64.bin
11c1ba9855cc310eded2e2b1bc73e1ae1292f3a94065bb090498e3fb2069c28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C64 5192 bytes
font_01_sfnt_off00007de5.bin
f4aac916e7f2b15a1db3ee5c4419087446e2855593f11482533b026c476f9424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE5 11300 bytes

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