PDF malware analysis — malicious · 3dc924989e14174e

MALICIOUS

PDF

37.7 KB Created: 2020-08-30 15:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 38097bed4967397759d506327098888e SHA-1: 57dc390ed289e392a29f67893ce9de61f45879de SHA-256: 3dc924989e14174e2ebc3b4a942579d30bb8984966b23374f562ee9e1f5ad23b

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to distribute further malware or conduct phishing. The document body, though heavily obfuscated, contains text suggesting it is an instruction manual, a common lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm possibly used for SEO poisoning to drive traffic to malicious sites.

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/wix?keyword=sheng+bang+hd-1688+instructions
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
- https://cdn.shopify.com/s/files/1/0433/2558/7609/files/36770957967.pdf
- https://cdn.shopify.com/s/files/1/0429/9096/0799/files/idylis_portable_air_conditioner_manual.pdf
- https://cdn.shopify.com/s/files/1/0428/2944/7335/files/lixawuxitef.pdf
- https://cdn.shopify.com/s/files/1/0437/8548/6485/files/dukowefibime.pdf
- https://cdn.shopify.com/s/files/1/0430/8297/3346/files/wakovafajimawot.pdf
- https://cdn.shopify.com/s/files/1/0438/2402/1664/files/98562845221.pdf
- https://cdn.shopify.com/s/files/1/0428/9898/1030/files/void_shotgun_gungeon.pdf
- https://static.usrfiles.com/ugd/374ce0_8154e0c9e8f94e949c3f9b7fc0f95eed.pdf
- https://static.usrfiles.com/ugd/b8c837_9f8ed2b1abe54ebb89ad6e7405b5138e.pdf
- https://cdn.shopify.com/s/files/1/0428/5107/4214/files/bijusalulufize.pdf
- https://cdn.shopify.com/s/files/1/0432/8855/9782/files/jedeti.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_off000054ba.bin` `b84c3d645e06d356efbcad2887cc5f9e66655b2525bdf0e31ba40c7b15502b22`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x54BA	5844 bytes
`font_01_sfnt_off0000688b.bin` `b67436b41778333cdbb118c8c9829f28136de5cb39c6f915b503b3a52eda8de2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x688B	9800 bytes

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