PDF malware analysis — malicious · e2231f58d9b76e7a

MALICIOUS

PDF

38.8 KB Created: 2020-09-01 21:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2668331432829f7a71fed04f8d578ae1 SHA-1: 8e41f165ba8f718f96cacf3e8ce44a87151925f9 SHA-256: e2231f58d9b76e7a0383f3a6c11b34e4d5b23843ffcd5c34c7a906514ea97882

154 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 pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious destination. The document body is largely unreadable binary data, but the presence of the URL 'https://ttraff.com/wix?keyword=couple+wallpaper+hd+for+android' within the stream confirms the malicious intent. No scripts were extracted from this sample.

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/wix?keyword=couple+wallpaper+hd+for+android
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
- https://cdn.shopify.com/s/files/1/0457/3996/6620/files/rulamasedoxaraliradedokoz.pdf
- https://cdn.shopify.com/s/files/1/0436/9219/5993/files/bioshock_infinite_ost.pdf
- https://cdn.shopify.com/s/files/1/0434/5564/3813/files/pisifemuwikifame.pdf
- https://cdn.shopify.com/s/files/1/0429/8326/0314/files/vuwidukabigolan.pdf
- https://static.usrfiles.com/ugd/b8c837_56dd455462e7419abe3af69b4c9d6f31.pdf
- https://static.usrfiles.com/ugd/b8c837_84d288eea9d94fd2b3483f295bb71c86.pdf
- https://static.usrfiles.com/ugd/b8c837_ea274ce4b2c140c895b4c319e94a1caa.pdf
- https://static.usrfiles.com/ugd/289c5e_7a6b4a5204414fcf8097ce847feb89a8.pdf
- https://static.usrfiles.com/ugd/1be480_7841da74e12146b0870b80937110242b.pdf
- https://static.usrfiles.com/ugd/b910ae_1fa5089f391e43b49a2d99e76d69cd0f.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_off00005b86.bin` `770a5921a45a48587b4a653e399ed49c0a9824f5e5a3e413d6d4b209f0a8473d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B86	4948 bytes
`font_01_sfnt_off00006c64.bin` `1a28f8263d8fb8fb12b61ad5bf879d7a874146db4cf3746730ea2d256b55fff3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C64	10060 bytes

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