Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ccf40ba4d74632…

MALICIOUS

PDF

37.0 KB Created: 2020-08-03 09:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 843a2ccbed8bb20f0101978303647875 SHA-1: d5148ab6c6af6f933e65d1e3af6a7b5438fa1b57 SHA-256: 81ccf40ba4d7463225291f7d2dc1de7935b3fe52ca6596abb8d0c89aaf9e8346
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to academic material and the malicious URL, suggesting a lure. The presence of a link farm heuristic further indicates an attempt to distribute malicious content through seemingly legitimate channels. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=psychology+david+myers+9th+edition+pdf
    • http://files.integritydetailcookeville.com/uploads/1/3/1/6/131636941/5aaf03.pdf
    • http://files.mariapalmerart.com/uploads/1/3/1/8/131856492/xemelexojirina-poworokopudota-losamutet-fonuluvodikaga.pdf
    • http://vuvajim.blissfulballoons.co.uk/uploads/1/3/1/4/131452922/lifiraxedajobevoxiva.pdf
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46496449222.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/jivapomepuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/xavejasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/niteditigigomerisuzi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1253/files/66660446444.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/sonanuluvenewofizuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/sitipisagejufagud.pdf
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/zozetegunarilofut.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/tobiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/18251785292.pdf
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/8326563985.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005053.bin
88538fb4e1e908512175dab9f0b90d36050c4c9b154a500519406818685a6722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5053 5888 bytes
font_01_sfnt_off00006445.bin
98fb49b836b75c855d4b4109010cb05fe82c29dd3a6935a0058e1f85ea8a014d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 10336 bytes

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