PDF malware analysis — malicious · a3b67876c9235a62

MALICIOUS

PDF

49.3 KB Created: 2020-08-21 02:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c36208fa10335a79776a22a57b3328ee SHA-1: d5012872622b406f77d1e44d58dbec7c080d4b3c SHA-256: a3b67876c9235a629beca41ed3da45bcec5ae2ae3877881d06f286342291ad3c

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm designed for SEO manipulation. One critical heuristic firing identified a link to a known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=ultrasound+guided+liver+abscess+drainage+procedure`. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious content.

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=ultrasound+guided+liver+abscess+drainage+procedure
- http://files.pearldeangarden.com/uploads/1/3/0/9/130969746/1909179.pdf
- http://tuzewijit.happenstancebordercollies.com/uploads/1/3/0/7/130739297/sabunabenefimixomol.pdf
- http://files.animalprograms.org/uploads/1/3/0/7/130776403/baxarapabafulu_xepidapivob_sofevenavomox.pdf
- http://fasajes.wolvescomputerrepair.com/uploads/1/3/1/4/131453630/1802897.pdf
- http://kokadiw.mysecretlagoon.com/uploads/1/3/1/4/131454859/ecf081bb52e6.pdf
- https://cdn.shopify.com/s/files/1/0427/6961/2966/files/wixorigapepajasoveb.pdf
- https://cdn.shopify.com/s/files/1/0428/5769/3347/files/16557812189.pdf
- https://cdn.shopify.com/s/files/1/0429/7415/0809/files/xexanefarabuwunaf.pdf
- https://cdn.shopify.com/s/files/1/0431/7901/6360/files/ar_condicionado_portatil_comfee_9000_btus_manual.pdf
- https://cdn.shopify.com/s/files/1/0429/8915/8554/files/minecraft_1._7._10_resource_pack.pdf
- https://cdn.shopify.com/s/files/1/0436/9612/8153/files/32348859266.pdf
- https://cdn.shopify.com/s/files/1/0427/8288/4006/files/finugazepuxuxulorowi.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdf
- https://cdn.shopify.com/s/files/1/0432/8531/5737/files/vuzujomovot.pdf
- https://cdn.shopify.com/s/files/1/0432/2174/5823/files/luturufuwa.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00008088.bin` `fb5c2278eb31f57bf0cf18bcf5397c1759656d9fcf63e6aa73040d07999cfc7e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8088	5432 bytes
`font_01_sfnt_off0000930a.bin` `473d58f199d02e7a06278a3ce1ccd74f75b2976b41cb73bdeadb108746e9e51b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x930A	11432 bytes

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