PDF malware analysis — malicious · 98f5650a66ae4176

MALICIOUS

PDF

43.1 KB Created: 2020-09-01 04:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8e8d39f8bf8c38707ccf078d84532fd0 SHA-1: 4415c3a759b8a3b37bc34f382cb72fe77997e68e SHA-256: 98f5650a66ae417687720790212cd43080fdcfc68718052344884ea9a878d5d9

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, directing users to a URL disguised as a free calendar template. The document body, though heavily obfuscated, contains the same URL. The file also contains a heuristic for a PDF link farm, indicating a large number of external links, many of which point to static.usrfiles.com.

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/wix?keyword=free+calendar+template+excel+2020
- https://static.usrfiles.com/ugd/6c032c_7b7c8cda00774205826f62e0b08b83f2.pdf
- https://static.usrfiles.com/ugd/b50c55_c183418de96b47c78b5aa567e7a2d886.pdf
- https://static.usrfiles.com/ugd/b8c837_8bcff15cfa1c4370b1d950ab64693aab.pdf
- https://static.usrfiles.com/ugd/1decf9_485f789168ac47eab8aee47a32ea6fc5.pdf
- https://static.usrfiles.com/ugd/b8c837_4c69bdd5ea6641f28ed114ab42664ee6.pdf
- https://cdn.shopify.com/s/files/1/0434/8451/2406/files/business_law_12th_edition.pdf
- https://cdn.shopify.com/s/files/1/0432/3406/6600/files/zejaniruwol.pdf
- https://cdn.shopify.com/s/files/1/0432/0218/3325/files/40711141969.pdf
- https://cdn.shopify.com/s/files/1/0438/4276/4962/files/google_camera_android_version.pdf
- https://cdn.shopify.com/s/files/1/0439/1718/1083/files/mortal_kombat_x_android_cheats.pdf
- https://static.usrfiles.com/ugd/1be480_268ad91208814d2da8347b8d3c10924f.pdf
- https://static.usrfiles.com/ugd/accd1f_949a6aea4b7e43b79693735864b37e18.pdf
- https://static.usrfiles.com/ugd/824332_644bdedf3e5b44c4b16e5adb7683060e.pdf
- https://static.usrfiles.com/ugd/808d8c_9767431425f9418d8546dcdec3792d96.pdf
- https://cdn.shopify.com/s/files/1/0435/9503/8877/files/17250581543.pdf
- https://cdn.shopify.com/s/files/1/0431/5152/4001/files/possessive_adjective_practice.pdf
- https://cdn.shopify.com/s/files/1/0435/9539/9325/files/68220987203.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.pdf
- https://cdn.shopify.com/s/files/1/0433/6350/0197/files/gfebs_user_manual.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/
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006a6a.bin` `6e0a4afd4da3cbce56e7db98b47fa3bd1591f2849846a616f2f2b6193c8d59f2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A6A	5340 bytes
`font_01_sfnt_off00007c82.bin` `8d93bf670b4742ff4ecbff8753686fd90d5b678cb34b38ea633cd839c36af80e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C82	10204 bytes

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