PDF malware analysis — malicious · b5db98a9bfa9e2ea

MALICIOUS

PDF

40.8 KB Created: 2020-07-25 05:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d06eef0aaaeec6d8da48aaaf0d1684c8 SHA-1: 6120a2ff270ae0608207542e15aa93bcf7c88c32 SHA-256: b5db98a9bfa9e2eac708bdfa4dd45ca5f3a7e7d30d1a94f0cabb8d62f590c6be

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to its inclusion of a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=kanda+bongo+man+music+videos'. The document body appears to be heavily obfuscated or corrupted, but the presence of numerous external links, many hosted on Shopify, suggests a coordinated effort to distribute malicious content or conduct phishing.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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.com/pify?keyword=kanda+bongo+man+music+videos
- http://files.ceayukon.ca/uploads/1/3/0/8/130815303/3552762.pdf
- http://files.ohslmc.com/uploads/1/3/0/7/130739715/xijer_livedezodusejok_legizagamisew_jowoselaxuxolem.pdf
- http://files.hillvalleyfarmdairygoats.com/uploads/1/3/2/6/132682303/7363778.pdf
- http://files.ceayukon.ca/uploads/1/3/0/8/13081530
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45598155969.pdf
- https://cdn.shopify.com/s/files/1/0427/9592/5671/files/65509605401.pdf
- https://cdn.shopify.com/s/files/1/0432/5795/4464/files/bexitopikumegikagum.pdf
- https://cdn.shopify.com/s/files/1/0428/2921/7958/files/10950869333.pdf
- https://cdn.shopify.com/s/files/1/0430/1769/9477/files/jefojisoko.pdf
- https://cdn.shopify.com/s/files/1/0430/0757/4179/files/vonikagiwipuba.pdf
- https://cdn.shopify.com/s/files/1/0432/5385/8472/files/83410833748.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
- https://cdn.shopify.com/s/files/1/0434/0151/1064/files/53278965646.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_off00006087.bin` `0f1e7bf8593b5e13ad3ac7f5de922a674f8294a79883098d6bb28842dad43e4b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6087	5104 bytes
`font_01_sfnt_off000071c8.bin` `a626653f415325a611df05ab4633447296cbc15b91c54a6e35b0bf3694f04061`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71C8	10280 bytes

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