PDF malware analysis — malicious · f0f634ed1bf981be

MALICIOUS

PDF

44.1 KB Created: 2020-08-31 19:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cb36a566761555f8d5d6a94d87609765 SHA-1: f0b7ecd58d795238dec511a29e390b08dcfef54f SHA-256: f0f634ed1bf981be1f08523cbdcad89646a5255a290a4c168e393f6d3d3401ba

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a mass external link farm, with many links pointing to static.usrfiles.com, and one critical link to a known malicious redirector at ttraff.cc. The document body, though heavily garbled, contains text related to 'Alberta blue cross claim forms' and mentions 'wkhtmltopdf', suggesting a lure for users seeking claim forms. The presence of a malicious redirector indicates an attempt to lead the user to a harmful site, likely for further exploitation or credential harvesting. No scripts were extracted from this sample.

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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=alberta+blue+cross+claim+forms
- https://static.usrfiles.com/ugd/3f0e57_1c0eb5aea856461faf4dd2edf2259b07.pdf
- https://static.usrfiles.com/ugd/b8c837_e35fb9174f764b579e129f622a8f2444.pdf
- https://static.usrfiles.com/ugd/735424_510f0281155e4e1ead11f4a6dfe8c51b.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xogasetixudaxaw.pdf
- https://cdn.shopify.com/s/files/1/0429/1405/4300/files/bojemalo.pdf
- https://static.usrfiles.com/ugd/b8c837_d5e24d60bf62464badaf3813dfdcb703.pdf
- https://static.usrfiles.com/ugd/6f53d7_ce76d20864834155a63c260d95e14ccc.pdf
- https://static.usrfiles.com/ugd/b8c837_deb1f9890a014b28a856c8492a422b5e.pdf
- https://static.usrfiles.com/ugd/b8c837_ca34c982b63b496895c4e463bcb72fb7.pdf
- https://static.usrfiles.com/ugd/b8c837_9548bc96a7074bd3b6b505c4f8f6eca4.pdf
- https://static.usrfiles.com/ugd/e2c250_f7c6b13fd4914bcc97089514ae140fa0.pdf
- https://static.usrfiles.com/ugd/b8c837_8b921cfaf69c4d6ab3c0c9fec767e3f7.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000600c.bin` `c02e8140cc59efdded0a314140845654e85df0001eb0496a43eb87b5d29bca57`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x600C	4932 bytes
`font_01_sfnt_off000070cf.bin` `5c84b279864464371f3eebedce2aed8681922511d6345134365c3fbd766fa514`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70CF	10364 bytes
`font_02_sfnt_off0000941e.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x941E	4324 bytes

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