PDF malware analysis — malicious · 90d33915bb783e6b

MALICIOUS

PDF

55.5 KB Created: 2020-08-10 12:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7c042c291dd377462827ad4660f4bd03 SHA-1: 76cf285e4669a88f4ff87334b5cae77072ad844a SHA-256: 90d33915bb783e6bb814b9604b47d40d866835c6769cacb874b0d465048a7bd4

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one pointing to a known malicious redirector at "ttraff.ru". The document body, though heavily obfuscated, contains text suggesting it is a lure for "Amcat coding questions pdf". The presence of a mass external PDF link farm indicates a likely attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign links.

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=amcat+coding+questions+pdf
- http://files.everythingalcoholink.com/uploads/1/3/0/7/130738785/3409601.pdf
- http://files.kiwanismusicfestivalsj.ca/uploads/1/3/1/8/131871568/vitewufapedelo_luwavibi_sufajigo_sekinelukagu.pdf
- http://files.workhorseexperiences.com/uploads/1/3/2/7/132740633/4859008.pdf
- https://www.gamblingid.com/
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78682713185.pdf
- https://cdn.shopify.com/s/files/1/0438/2674/1405/files/63036322952.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wabodenerevugibew.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
- https://cdn.shopify.com/s/files/1/0436/3013/3408/files/96101848328.pdf
- https://cdn.shopify.com/s/files/1/0435/8435/6507/files/78906831875.pdf
- https://cdn.shopify.com/s/files/1/0450/2369/0916/files/proyecto_de_investigacion_educativa.pdf
- https://cdn.shopify.com/s/files/1/0430/3526/3130/files/35558725198.pdf
- https://cdn.shopify.com/s/files/1/0434/2457/9736/files/11177692745.pdf
- https://cdn.shopify.com/s/files/1/0431/1154/7037/files/tezojof.pdf
- https://cdn.shopify.com/s/files/1/0433/7005/3784/files/2673792685.pdf
- https://cdn.shopify.com/s/files/1/0434/4433/8838/files/zabunijiwozalopinan.pdf
- https://cdn.shopify.com/s/files/1/0434/2897/0647/files/archaeology_and_humanity_s_story_free.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007c91.bin` `8efc5deb2bcc9c8593ee82ad38078f6385923cfab1fbe5f08b7fd9ed69e39d56`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C91	5344 bytes
`font_01_sfnt_off00008e9d.bin` `430245cc9af955d603c8c7d330abc3bd847af40aef3a71e1282a838b35288e4d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E9D	16336 bytes
`font_02_sfnt_off0000c13f.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC13F	4324 bytes

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