Malicious PDF — malware analysis report

Static analysis result for SHA-256 a009f3dcf279a7d2…

MALICIOUS

PDF

35.5 KB Created: 2020-08-12 15:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97b971e8b70c9c43e5a7b189d047d10a SHA-1: 2acfc80ab7961758260af9e1763d81797cdfa4dc SHA-256: a009f3dcf279a7d27aa0164420cf7f3f681d9f95a04963a34cc18a132cae858f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely designed to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.ru/pify?keyword=religion+altered+states+of+consciousness+and+social+change+pdf
    • http://files.stitchedbyknight.co.uk/uploads/1/3/0/8/130814680/949333.pdf
    • http://files.lukegasser.com/uploads/1/3/1/3/131380305/didoduro-laxazuvuzeguru-gifavik.pdf
    • http://files.bandedbird.com/uploads/1/3/1/1/131163718/fenovonupepuxud-gejubibonikuk-jazimi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/ruzifiduxepinirag.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/xizomunozimelewuno.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6849/files/19923627934.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/28841304428.pdf
    • https://cdn.shopify.com/s/files/1/0439/1501/8392/files/10959478753.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/mopaziguxefixane.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/74966642977.pdf
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/96264477921.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3791/files/how_to_speak_french_fluently.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/36864747861.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.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_off00004a4b.bin
05f4b6536dcdc52d2a78ae35ac864ab3e473076a32a0f6f536000b6b3c905a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4B 5424 bytes
font_01_sfnt_off00005cbd.bin
68a2268d7e5f3f8a0cb483378c8c496c38aefe45597f3c0ad19f449d266dd197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBD 10484 bytes

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