PDF malware analysis — malicious · d052b1369771faf8

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 08:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d2bf8c4e736719bb66dfb57ee82f488c SHA-1: 6f456d33cc8b9fcf4b08147cc5331b36c5bc849b SHA-256: d052b1369771faf8d82c171f11993e132d3427572a20f8434fbc1e7ee84028c8

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also contains a large number of links to other PDFs hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness. 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.cc/wix?keyword=el+completo+manual+del+suicida+onlin
- https://static.usrfiles.com/ugd/b8c837_d1b07e5cc80f421399e748d3e082ab2a.pdf
- https://static.usrfiles.com/ugd/b8c837_0ed75cfebe6046b6a65ea0b82b94befb.pdf
- https://static.usrfiles.com/ugd/2486b5_050217cbfcb645e2a63719eab403e3cc.pdf
- https://static.usrfiles.com/ugd/f1780b_aecbf88a9df64ccea496d1da0aa60306.pdf
- https://cdn.shopify.com/s/files/1/0430/0816/3993/files/tetomigunedugoj.pdf
- https://cdn.shopify.com/s/files/1/0434/0416/5276/files/bohemian_rhapsody_classical_guitar.pdf
- https://cdn.shopify.com/s/files/1/0437/6179/5230/files/29602629240.pdf
- https://static.usrfiles.com/ugd/b8c837_f3b654f51e954338b4cbf57c9b712593.pdf
- https://static.usrfiles.com/ugd/b48b60_151e32df70e1478697200c0a4f28457f.pdf
- https://static.usrfiles.com/ugd/f515ca_b3bd34f7a3e44c8b9e7b9c9cae1b7d01.pdf
- https://static.usrfiles.com/ugd/696117_2c7cff3acea145b6923614fb05294598.pdf
- https://static.usrfiles.com/ugd/912de2_529222f713bd4df0a19e3707e455fb59.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_off00007990.bin` `c96dedec19e710cfd94ddc1c67b0c1c4ce9400968665548b7bcf1b7055c3775e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7990	5080 bytes
`font_01_sfnt_off00008ab6.bin` `c58c407a62fef3b0a03efdffc180b0296f68f2a98861be91b66cb8e3e4fef7ef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AB6	11024 bytes

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