PDF malware analysis — malicious · b49b07a4ce6e54d0

MALICIOUS

PDF

44.2 KB Created: 2020-08-20 06:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0fc349be5f5d471cddd2583425ffee48 SHA-1: 366b161f17896ea70211d13a49bca8be69ec275c SHA-256: b49b07a4ce6e54d0255ae5ee4db138c998c65045156f07920be99cc18b0149c8

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/pify?keyword=kindle+book+formatting+problem'. Another critical heuristic identified a PDF link farm, suggesting a spam or SEO-based distribution method. The ML classifier strongly flagged this PDF as malicious. The document body, though partially garbled, contains the lure text and the malicious URL, reinforcing the phishing or scamming intent.

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.ru/pify?keyword=kindle+book+formatting+problem
- http://sowuw.wc911.com/uploads/1/3/0/7/130776167/lelesukujazidotazaxe.pdf
- http://files.braznstudio.com/uploads/1/3/0/9/130969746/2a9c3bc2d6.pdf
- http://files.wardswaterpumps.ca/uploads/1/3/2/7/132740204/ligexupowenik-rofibinu-tadixodetugujej.pdf
- https://cdn.shopify.com/s/files/1/0429/8774/9525/files/22509939295.pdf
- https://cdn.shopify.com/s/files/1/0432/4923/8184/files/xujivazedujised.pdf
- https://cdn.shopify.com/s/files/1/0434/0177/3212/files/tikemuja.pdf
- https://cdn.shopify.com/s/files/1/0434/1697/7559/files/13508572326.pdf
- https://cdn.shopify.com/s/files/1/0431/5942/1092/files/63486714616.pdf
- https://cdn.shopify.com/s/files/1/0428/6572/1503/files/21606162535.pdf
- https://cdn.shopify.com/s/files/1/0428/9472/1187/files/12321535700.pdf
- https://cdn.shopify.com/s/files/1/0433/3846/5435/files/best_csgo_config.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_off00006d0a.bin` `d8066c82f92cd9f367f5ec68e3b9851f46c8022483b37fa4441abcc5e37d303e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D0A	5356 bytes
`font_01_sfnt_off00007f1d.bin` `57f6b13d314ce842d1da0d5db3cfba6c2f46c943d4adb67d56c3625001fa99b5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F1D	11400 bytes

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