Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe81d9beac18c4de…

MALICIOUS

PDF

60.4 KB Created: 2020-07-19 18:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6073153fa45ad80071e7d98a8ff0fab SHA-1: 55478d976c8d26e6a8dd631dcb767ffcfecf4827 SHA-256: fe81d9beac18c4ded6e9a23e43e63a82aa2283be65b965606f6a00e3cf614568
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDF files hosted on various domains. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document is designed to lure users to malicious sites, likely for phishing or malware delivery.

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=write_external_storage+permission+in+android+marshmallow
    • http://files.ozarkcountryoutfitters.com/uploads/1/3/1/4/131409794/zikaxenarifu-dukoxasaper-bidunipulezit.pdf
    • http://files.pnmassoc.com/uploads/1/3/0/8/130814601/jalapovi_nagizeratup_xefogudorovom.pdf
    • http://files.rinconcasa.com/uploads/1/3/2/6/132682820/kibokeguwisilejukege.pdf
    • http://files.pickmuseumhmongexhibit.org/uploads/1/3/1/3/131384777/bivakegeranifebobuf.pdf
    • http://files.barredefinedturlock.com/uploads/1/3/1/3/131381095/3041404.pdf
    • http://files.salt-tz.com/uploads/1/3/1/4/131406303/todejoseditet.pdf
    • http://files.standby-travel.co.uk/uploads/1/3/1/0/131070920/zukanafiderafedij.pdf
    • http://files.standby-travel.c
    • https://dapajopimaje.files.wordpress.com/2020/06/wosevotopidenuvilizogosot.pdf
    • https://nefakiwaputi.files.wordpress.com/2020/07/rulevopitugup.pdf
    • https://gijatok.files.wordpress.com/2020/06/wegefubepok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/bubusarebowasonipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/tigoxiwojixugof.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/sobelurejavemeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/lituwerevabuzob.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/nopusuwazuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/dufamiziwugudavegovabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/zamujibumokuzorifodofor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008eab.bin
2eb7d35c74dbe9784da1f18d1ad21f76543aa90ae2e188f9b924b1ca4aea44da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAB 5364 bytes
font_01_sfnt_off0000a0d0.bin
87e89ffccf379006c797c63673b8a1a83a53b2cd83137b5a17087c5a356f1ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D0 6620 bytes
font_02_sfnt_off0000b25e.bin
02af4136d9c9bdeeab7eb65599c08ddd38cf024eb00a8ae2ae13e7a354f2954a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB25E 15744 bytes

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