PDF malware analysis — malicious · d8f872d5c4d3bc9f

MALICIOUS

PDF

47.7 KB Created: 2020-08-31 05:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fff2ec6fc81509cc9601582985fd5a50 SHA-1: 4f3d6ef34517feb58fb90c125950cefac04ec98d SHA-256: d8f872d5c4d3bc9f8c0f8e529e690a083fbaca2ca6389621d08ee223d988791a

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link disguised as a download for a technical handbook. This link, 'https://ttraff.cc/wix?keyword=microstrip+antenna+design+handbook+pdf+free+download', points to known malicious redirector infrastructure. The document also contains a large number of links to external PDFs, many hosted on 'static.usrfiles.com', suggesting a link farm or SEO poisoning tactic to attract users searching for specific content.

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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=microstrip+antenna+design+handbook+pdf+free+download
- https://static.usrfiles.com/ugd/696117_dfc2120712774bc2989f45e0f06292ec.pdf
- https://static.usrfiles.com/ugd/6da380_01dae5239fa544b482a2253184168279.pdf
- https://static.usrfiles.com/ugd/544c7e_088cfdfa6c8744c1bcb692049c8e6df5.pdf
- https://static.usrfiles.com/ugd/0779a3_3244f478f6344f009ca30a71d1e82e57.pdf
- https://static.usrfiles.com/ugd/575363_21cdf69756194fb0aa36dba648bc5a3b.pdf
- https://static.usrfiles.com/ugd/6cf392_4bee29e3f6724239bc8078b3714abc81.pdf
- https://static.usrfiles.com/ugd/fa32a6_10ecb0ee310e49d290d5565e7075ebba.pdf
- https://static.usrfiles.com/ugd/89363e_36c2c1c66eb14d9b9f6915f18074b0d8.pdf
- https://static.usrfiles.com/ugd/b8c837_1af16ffb28e6454c916cbb9a6fc20157.pdf
- https://static.usrfiles.com/ugd/b8c837_e117eac58e9747daafcdd01f9042c3f9.pdf
- https://static.usrfiles.com/ugd/3bcfef_fc246f75200e44efb457879fda20d35c.pdf
- https://cdn.shopify.com/s/files/1/0428/6880/1695/files/dodapawozu.pdf
- https://cdn.shopify.com/s/files/1/0436/9793/0393/files/jolaku.pdf
- https://cdn.shopify.com/s/files/1/0430/0469/0581/files/ever_never_already_yet_exercises.pdf
- https://cdn.shopify.com/s/files/1/0428/2230/3911/files/washington_state_patrol_accident_report.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_off00007932.bin` `ced585b39927ce836338a9f4a78e88f4ef9d761246388cbbeea079707b8abea3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7932	5716 bytes
`font_01_sfnt_off00008cb7.bin` `6a1aa4aecb8a9c9cb9d62c861babec984beba5d6bb5bfa1a203b645e60694af9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CB7	10908 bytes

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