PDF malware analysis — malicious · 38599fa6bc64e098

MALICIOUS

PDF

37.2 KB Created: 2020-08-30 23:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8a958bd9f358024bfa86190b961e3ec3 SHA-1: 0087df5a354d305ffc99ed017dfa7ee843b901a8 SHA-256: 38599fa6bc64e098e3b5002d9ed537b9e4c5265c9c735b9c7553e3eb1dcae2fa

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute content. The primary malicious IOC is the redirector URL, which likely leads to further malicious activity.

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.me/wix?keyword=a+path+to+combinatorics+for+undergra
- https://static.usrfiles.com/ugd/bd5c68_0e063e9985ed4f6d9ac7569cde728f4b.pdf
- https://static.usrfiles.com/ugd/4bdc6d_83219ea2cd894743a3d6c7cf348614c7.pdf
- https://static.usrfiles.com/ugd/362633_1ea66eaab0bb4f78a4c1ea445e9aca76.pdf
- https://static.usrfiles.com/ugd/b8c837_449531be947f4abbbab4ac6ba5463b66.pdf
- https://static.usrfiles.com/ugd/575363_b0707a48b22f4edca3e8149095cd4075.pdf
- https://static.usrfiles.com/ugd/b8c837_6696f1346f22413383b16c2a7a2f1f91.pdf
- https://static.usrfiles.com/ugd/b8c837_8725122567ee40dab0aea424436dcdea.pdf
- https://static.usrfiles.com/ugd/b8c837_0d364dab46e24a209039d58dd30071b8.pdf
- https://static.usrfiles.com/ugd/a31856_5f48f0a6edf54693b270cd5f0a7bcafe.pdf
- https://static.usrfiles.com/ugd/0dd040_15d22e9b08024e60ae17aa18ae5c2f1c.pdf
- https://static.usrfiles.com/ugd/b8c837_c612aa6c3eb24ee98c48caaadba5c8bb.pdf
- https://static.usrfiles.com/ugd/b8c837_7254b13464f7453bb03adde8555a7a0a.pdf
- https://static.usrfiles.com/ugd/b8c837_ae03b30485084813961b24a2ed935480.pdf
- https://static.usrfiles.com/ugd/913720_f03788e7ece24d209fc0efe8777e7a42.pdf
- https://static.usrfiles.com/ugd/ca32a8_0a8fdbc22b724e00a080d7a75af1fecf.pdf
- https://static.usrfiles.com/ugd/ceb2e8_dec0138f9e314268a40b488176d3d08f.pdf
- https://static.usrfiles.com/ugd/0bcf16_66d823f4871e44d0979c69c457fcee1e.pdf
- https://static.usrfiles.com/ugd/5b5da7_e8b30820155148f0a19e33f74dfe8e56.pdf
- https://static.usrfiles.com/ugd/c7a620_0ad481c5a433439a9f6b1dd5d9d987af.pdf
- https://static.usrfiles.com/ugd/eb4c03_137657779fb347409344f3ede1bc2ecb.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_off00005335.bin` `6cd3b9c5a76b54f880ca12b98f6f8ee64340c3b4025784dead09e7d4ab81255f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5335	5664 bytes
`font_01_sfnt_off00006643.bin` `e6b9045e3c9ec0d8b466d9e2eed522f3b761c330655ed57a03e9c62746c6d946`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6643	9820 bytes

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