Malicious PDF — malware analysis report

Static analysis result for SHA-256 13142530c12ab111…

MALICIOUS

PDF

77.6 KB Created: 2020-08-28 00:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5feb779c2763d81ffcf14033e3da18ca SHA-1: 1843733b5c5d3af066e017ed3e99c08b7b01495c SHA-256: 13142530c12ab1112e21dbcf72b5b55e8691616a7ab7e5fb33c390b1d218fb9d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is part of a link farm with 30 external PDF links, suggesting a campaign to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=%25D9%2583%25D8%25A7%25D8%25B1%25D9%258A%25D9%2586+%25D9%2581%25D9%258A%25D8%25B4%25D8%25B1+%25D9%2588%25D9%258A%25D9%2583%25D9%258A%25D8%25A8%25D9%258A%25D8%25AF%25D9%258A%25D8%25A7
    • http://files.gbsupplyco.com/uploads/1/3/1/4/131482975/pobusazilotatuzere.pdf
    • http://files.reynoldsyachts.net/uploads/1/3/2/7/132740533/zubufirol.pdf
    • http://refejipum.cameronshardware.com/uploads/1/3/1/3/131380600/tibelosa-radidowotu.pdf
    • http://files.wooff.ca/uploads/1/3/0/9/130969148/fugevawetilabirunedi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/arboles_de_decision_libro.pdf
    • https://cdn.shopify.com/s/files/1/0432/6286/9670/files/87158080397.pdf
    • https://cdn.shopify.com/s/files/1/0434/6527/7605/files/one_page_business_plan_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/7100920808.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/29265869363.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/arabinose_bacterial_transformation.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41078692832.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/vopifofugegudaralerilokew.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/gifenikenubenali.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/wutudogimojubomedowumix.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2662/files/university_of_alberta_course_listing.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000ed1f.bin
ae550d6387fc7408229e60f18ebe6c733cc6e696afeaaa43c7f4022ab92b3cbb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xED1F 33200 bytes
font_00_sfnt_off0000a975.bin
ca42d5ed38f04d35f6c6ef927e9c0e2abbbfec64d896d823d531a8752c72a089		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA975 4068 bytes
font_01_sfnt_off0000b753.bin
02e7fd7384cb690d7894ea300a0687e8a0eab6d2c7fff6b014137fbad932d2b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB753 17604 bytes
font_02_sfnt_off0000d166.bin
69194ae509598e5d8887924706e6c49cd83963a0d121308b1466a723aac7054a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD166 8124 bytes

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