PDF malware analysis — malicious · 588fc257595efc27

MALICIOUS

PDF

44.5 KB Created: 2020-08-06 09:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 991f720e317c5f9a181bdc9e69a8f3fd SHA-1: b7c1ba1ded7fab4bc62a0287575d2908b3eb88ed SHA-256: 588fc257595efc27c47c0e2ab1e99db901f5f87bbdd9c789fd555636b83eb84f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a link to a game trainer PDF. The document body, though heavily obfuscated, contains the target URL and references wkhtmltopdf, suggesting it was generated programmatically. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for 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.cc/pify?keyword=antonio+candido+pdf
- http://files.eliseblackwrites.com/uploads/1/3/1/3/131381612/31c5308.pdf
- http://files.honitonforum.org/uploads/1/3/2/6/132681670/tosimisofuzem_xorezubamutu.pdf
- http://files.tomcondotta.com/uploads/1/3/1/3/131382274/7816343.pdf
- http://files.chicagobonebroth.com/uploads/1/3/1/4/131437394/mokidaki.pdf
- http://files.kristamasonyogafitness.com/uploads/1/3/1/3/131379439/tukozadisi.pdf
- https://cdn.shopify.com/s/files/1/0438/7841/6539/files/far_cry3_trainer.pdf
- https://cdn.shopify.com/s/files/1/0429/9233/7059/files/43204710435.pdf
- https://cdn.shopify.com/s/files/1/0431/6423/7988/files/69952431851.pdf
- https://cdn.shopify.com/s/files/1/0435/9441/6290/files/solid_liquid_gas_pictures.pdf
- https://cdn.shopify.com/s/files/1/0435/1878/7736/files/ielts_academic_reading_test_2020.pdf
- https://cdn.shopify.com/s/files/1/0434/1334/0312/files/libro_balun_canan_rosario_castellanos.pdf
- https://cdn.shopify.com/s/files/1/0430/0508/3811/files/struts_tutorial.pdf
- https://cdn.shopify.com/s/files/1/0430/9375/4009/files/86317243962.pdf
- https://cdn.shopify.com/s/files/1/0434/4443/7144/files/accuweather_douglas_az.pdf
- https://cdn.shopify.com/s/files/1/0432/7076/6750/files/23578096191.pdf
- https://cdn.shopify.com/s/files/1/0427/5650/5756/files/makuxizipawevu.pdf
- https://cdn.shopify.com/s/files/1/0427/7328/2983/files/lubidunutuvemodunad.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_off00007296.bin` `b1b6c67f0c71c412b9b3101118c57545d0e765e1fe6d3185b3980ae6caf59f79`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7296	4832 bytes
`font_01_sfnt_off00008322.bin` `802f1561f475a5ed2f758b2803b413d9d8a341c445573bdb67dfdc928a95df84`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8322	9876 bytes

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