Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef14dbb8debbf03…

MALICIOUS

PDF

44.7 KB Created: 2020-07-28 21:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a823d087b9403963aa231227283907d4 SHA-1: f5f880e525b1c0649c85c6a564440872b1f4d9e8 SHA-256: 6ef14dbb8debbf035e43c954668659237ed8d83977ec35952a913625b2632490
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a "persuasive speech outline pdf". It also hosts a large number of external PDF links, many of which are hosted on Shopify. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector suggests an attempt to lead the user to a malicious site.

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=persuasive+speech+outline+pdf
    • http://files.seacopartsintl.com/uploads/1/3/0/7/130776225/1295733.pdf
    • http://files.tricotting.com/uploads/1/3/0/9/130968984/vesuzebifoje_fofuteputi.pdf
    • http://files.fawkhamridingclub.com/uploads/1/3/0/7/130776245/nodixuto-pudiwanasexa.pdf
    • http://files.soundmethoddjservice.com/uploads/1/3/1/3/131384171/3420729.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/91050034233.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/muvopaxejiwoxusamu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/fusaxenokigitanaduwasogod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/10293706109.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/11251055153.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/delagodadoxevorexoxisaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/90534668941.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9648/files/rujufutuvir.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/48322413039.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99289858455.pdf
    • https://cdn.shopify.com/s/files/1/0428/7329/0908/files/tisekojaderetofire.pdf
    • https://cdn.shopify.com/s/files/1/0432/8528/2980/files/lujabepudazo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/toviketepefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/jowalugulalebawuwuxa.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_off000070c2.bin
841dc84b956438699c04016fd0e4ce09a8fcb47d98b81abe9cc080fca4465373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C2 5184 bytes
font_01_sfnt_off0000825c.bin
84ddc37a93eb5ab130bdf8a0268900c84297b97b5a1f386084e21fb2835b6e3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825C 10388 bytes

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