PDF malware analysis — malicious · 1a34c92d90e951d9

MALICIOUS

PDF

62.2 KB Created: 2020-09-08 18:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a5718d47376f554569dc1155571a7ffc SHA-1: b05238af95a69b1eb22cba9c61f65490bd928e3c SHA-256: 1a34c92d90e951d9f2bcafa84c1961c67b18dc4bb3d0aa96631c6a0744a2f4a8

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a malicious redirector and link farm. It contains numerous embedded URLs, with one specifically identified as a malicious redirector pointing to 'https://ttraff.me/wix?keyword=assamese+song+zubeen+garg+song'. The presence of a large number of external PDF links, many hosted on static.usrfiles.com and cdn.shopify.com, suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, and the document body is heavily obfuscated.

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.me/wix?keyword=assamese+song+zubeen+garg+song
- https://static.usrfiles.com/ugd/733c1f_e1c32887331a468e92a7cb2614d7511c.pdf
- https://static.usrfiles.com/ugd/87a178_84701a40bdec43cb81885231247824cf.pdf
- https://static.usrfiles.com/ugd/7598fa_c30af4a246b044479408a023b51cf440.pdf
- https://static.usrfiles.com/ugd/694d5d_d38d2320c17d498ea0e84c1e8c525b46.pdf
- https://cdn.shopify.com/s/files/1/0429/6769/5523/files/kogejusaparu.pdf
- https://cdn.shopify.com/s/files/1/0429/2768/5799/files/23918060555.pdf
- https://cdn.shopify.com/s/files/1/0433/3328/8088/files/42340530186.pdf
- https://cdn.shopify.com/s/files/1/0434/4394/5622/files/act_reading_practice_test_with_answers.pdf
- https://cdn.shopify.com/s/files/1/0431/1593/7948/files/16726849409.pdf
- https://static.usrfiles.com/ugd/ac8c68_0cfdd4169c1b4254bccea95015ceb809.pdf
- https://static.usrfiles.com/ugd/9ec29b_31af3767456a458cb5a1f0341f649377.pdf
- https://static.usrfiles.com/ugd/b8c837_41dbe2e84a314494ad4f080c7dd49871.pdf
- https://static.usrfiles.com/ugd/d54300_24c681743bf441758f7f1e8f4e8f97c2.pdf
- https://static.usrfiles.com/ugd/21b4a7_d9fc48f795db43ae866ae5cf68604925.pdf
- https://static.usrfiles.com/ugd/8de238_7509d113b2e346a68d6a579f95b822f9.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_off00009957.bin` `a8e683022969065121751716bc7a390a31746b45285fab6ba4e360ba921f973a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9957	5152 bytes
`font_01_sfnt_off0000aaca.bin` `b4cf947538d7ac497a6654312c5f2120c7d1579bfa75211fb7ff0884d86e46f4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAACA	6516 bytes
`font_02_sfnt_off0000c004.bin` `4ae225dd59f67b6cbd1f3d329d737e5a65adf7028e51c81b2d681f05483ba048`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC004	13728 bytes

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