PDF malware analysis — malicious · 35d4f0fea7f9fbf0

MALICIOUS

PDF

47.5 KB Created: 2020-08-31 05:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e3bf743f8dd4f2dc750b6eb27d893667 SHA-1: 58f4e1b6566790437615cd671a5bd02185f22613 SHA-256: 35d4f0fea7f9fbf0eaea168b911f223aabd1e9d3da7f8f47345d0443107932fd

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to lure users to malicious sites. This suggests a phishing or malware distribution campaign.

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=reservoir+dogs+tipping
- https://static.usrfiles.com/ugd/895bef_0f4caada3e04405f9e4b68808fc66315.pdf
- https://static.usrfiles.com/ugd/d9d1f5_c4703afd2558453a944c5b114b0adf7d.pdf
- https://static.usrfiles.com/ugd/3e9e83_cfab78b709794cb38016e9212f567d63.pdf
- https://static.usrfiles.com/ugd/b8c837_8df1bf6221554a348baa1b47088b99a1.pdf
- https://static.usrfiles.com/ugd/b8c837_529e85e8eafa4c27acd767bef33f89b5.pdf
- https://static.usrfiles.com/ugd/33c377_b1eee0df0bdb47eda6e3edb017428d61.pdf
- https://static.usrfiles.com/ugd/b8c837_b4a0729e245046edae04b76f9e289909.pdf
- https://cdn.shopify.com/s/files/1/0431/2875/0241/files/duvam.pdf
- https://cdn.shopify.com/s/files/1/0431/0705/7825/files/boges.pdf
- https://static.usrfiles.com/ugd/6cfc61_5365c3448bd243c9bc5495dbb913e8ae.pdf
- https://static.usrfiles.com/ugd/b8c837_5ac3ee028dd74febb13802a87a7de7f6.pdf
- https://static.usrfiles.com/ugd/b8c837_24701f51696246a39130affad968ae1a.pdf
- https://static.usrfiles.com/ugd/55f640_26e4a5badadc4d5385fd6048461fd17c.pdf
- https://static.usrfiles.com/ugd/9734e7_afc57578b61b47d9bea8510921b00b97.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_off00007d47.bin` `c63cbeb8ba1a81059ccc9c0567aa4ff563d4aeacac1b68d034c2612091bd100c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D47	4952 bytes
`font_01_sfnt_off00008e43.bin` `8755c008f6a814e4ca28854d1d2a074f06cb505ae2d67109ad999953eec46292`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E43	10316 bytes

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