PDF malware analysis — malicious · ae9f7862d2a10a95

MALICIOUS

PDF

43.4 KB Created: 2020-07-31 19:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 06eb8c44599b3ba3d02ff875ee1bbe31 SHA-1: a45e8b76d75d8bb0548d21ef225af6ef69eb213f SHA-256: ae9f7862d2a10a95751d9c11a499669123da435da52b6ff5c787e6f5669c3e86

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, and PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains garbled text, suggesting it's not intended for direct user consumption but rather to host links.

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=css+z+index
- http://files.theuniqueboutique.co.uk/uploads/1/3/0/7/130740589/1169495.pdf
- http://files.terramutt.com/uploads/1/3/0/9/130969659/remipileg_fukalipokag_kawugigi.pdf
- http://files.marcelwesdorp.nl/uploads/1/3/1/4/131454255/f418353a54cefcc.pdf
- http://files.blog.deansoiltrek.com/uploads/1/3/1/1/131164153/2973878.pdf
- https://cdn.shopify.com/s/files/1/0432/8400/5032/files/vobolurelesadanirurex.pdf
- https://cdn.shopify.com/s/files/1/0432/2964/2911/files/97769413925.pdf
- https://cdn.shopify.com/s/files/1/0430/1189/9551/files/32735777676.pdf
- https://cdn.shopify.com/s/files/1/0437/1814/8261/files/kofozowerufel.pdf
- https://cdn.shopify.com/s/files/1/0434/9755/4084/files/96635152833.pdf
- https://cdn.shopify.com/s/files/1/0431/5915/8938/files/81188428629.pdf
- https://cdn.shopify.com/s/files/1/0428/6627/8556/files/fulub.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
- https://cdn.shopify.com/s/files/1/0432/8731/4590/files/tukina.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
- https://cdn.shopify.com/s/files/1/0431/8212/9320/files/40875762650.pdf
- https://cdn.shopify.com/s/files/1/0434/5636/4709/files/94035932524.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_off00005bac.bin` `53deecc55e039cd07635252245354ef79f4830a434b633f81f888b7cfae82ebb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BAC	4220 bytes
`font_01_sfnt_off00006a00.bin` `0fc6f75228a5e0be628b06d2bbf1b2e872a52629fb3964e33ec8bed5bfb34776`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A00	14512 bytes
`font_02_sfnt_off00009327.bin` `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9327	4324 bytes

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