PDF malware analysis — malicious · c9e51e96fdeacf3e

MALICIOUS

PDF

82.1 KB Created: 2020-09-04 05:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9de785e2e12d5e9a179c10a6a028683b SHA-1: 8c760035f013bccc9aee8fa03c72a90133e62ee9 SHA-256: c9e51e96fdeacf3e4079c374bda9b8f634ff07277d33ebc7b550a8f3914152c9

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=carve+out+financial+report'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links, many hosted on 'static.usrfiles.com', indicates a link farm designed to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=carve+out+financial+report
- https://static.usrfiles.com/ugd/b8c837_f5dee3ed256d4d3ba68fd5e3a17e7059.pdf
- https://static.usrfiles.com/ugd/6203b9_8d85fbbd332b49f29784ebc02e207245.pdf
- https://static.usrfiles.com/ugd/bfbc46_c9369adcbdb3424b93b925deaeb65480.pdf
- https://static.usrfiles.com/ugd/b8c837_cd33b18b82f54cf28e2726869c1ee28e.pdf
- https://static.usrfiles.com/ugd/eb4c03_865c0b106e3f4856a393ef6a60a3e006.pdf
- https://static.usrfiles.com/ugd/8f6098_efa1ec1db4b0416b9c9b2f4d40a87f73.pdf
- https://static.usrfiles.com/ugd/19ce5d_f2eaffd486ae41b48045689891a7122f.pdf
- https://static.usrfiles.com/ugd/b8c837_fb3e26e588d44a439b6545c18e965d58.pdf
- https://cdn.shopify.com/s/files/1/0456/9890/8316/files/dabolufuxagaw.pdf
- https://cdn.shopify.com/s/files/1/0438/7779/3960/files/rufibejemeparowab.pdf
- https://cdn.shopify.com/s/files/1/0437/7152/7325/files/zilobolovaxijam.pdf
- https://cdn.shopify.com/s/files/1/0427/3415/7991/files/39638396719.pdf
- https://cdn.shopify.com/s/files/1/0469/3295/1195/files/the_deal_elle_kennedy_read_online.pdf
- https://cdn.shopify.com/s/files/1/0428/4681/4374/files/89802578260.pdf
- https://cdn.shopify.com/s/files/1/0431/0319/1193/files/xufemuvu.pdf
- https://cdn.shopify.com/s/files/1/0431/9313/9357/files/befozebaduxijikikaka.pdf
- https://cdn.shopify.com/s/files/1/0438/9748/7512/files/femebijujarijexisoveremep.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_off0000fc9b.bin` `6c93473ea9eab9e0c17026ce71ca76e75b076fa92c5324be6bde1bb398cea6ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC9B	4796 bytes
`font_01_sfnt_off00010d08.bin` `028e7f33275eb96c64e8482497b43b2829f1a53990a692ee7bd1be79bd9d6675`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D08	14776 bytes

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