Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca099a94b4e1c64…

MALICIOUS

PDF

40.7 KB Created: 2020-08-04 02:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a67f7e2d52062164c70197b6595a74d7 SHA-1: b9658f8b948f296d63e32ecd833b48e58d1f48ad SHA-256: 1ca099a94b4e1c6476b2e1226ccfb90942e14ce54ade6ed3f81fc7db3455e6e2
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly legitimate-looking documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=absolute+pressure+and+gauge+pressure+pdf
    • http://files.hellogoimage.com/uploads/1/3/1/6/131607269/05659fc.pdf
    • http://files.gatewaycathedral.com/uploads/1/3/1/0/131069869/7382438.pdf
    • http://files.southhighchoirs.com/uploads/1/3/0/8/130814101/laloseki.pdf
    • http://files.thelawnation.com/uploads/1/3/2/7/132712093/57d6ddb6fd2b.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/kigetevikoxamoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/kirarogurififekevakol.pdf
    • https://cdn.shopify.com/s/files/1/0428/4838/7239/files/27545860166.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/submit_article_designed_by_askgraphics._com.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5195/files/94684537810.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/destiny_2_discord_overlay.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/pamisowosowuletuzowinelup.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/resmed_s9_clinician_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/zojuberupitipux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/73126088387.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/80420812369.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/8741740231.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_off0000612a.bin
3b0d3515ca50193f316ee7b2517de15927859fb8cedbb6cf6629b4b9c4feb681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 5336 bytes
font_01_sfnt_off00007359.bin
00ab4ba550aa67f09786ca2bc629c80b897d5f2cb0e5dfdd52bfc8b83f6e36f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7359 10076 bytes

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