PDF malware analysis — malicious · 3601a324b6281dfe

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 07:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: aabc479d531b7684a359ae52fed1d1fe SHA-1: 6c5489ec42f83d37ae878170e2d1d3325a40c8d1 SHA-256: 3601a324b6281dfe441733bcf2858ae47842769a339de78dfe3c1f5c87abc1d9

130 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=hirens+boot+dvd+2017'. Additionally, it exhibits a PDF link farm pattern, with numerous links to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to these URLs. The presence of a 'download button' heuristic further supports the lure mechanism. The primary attack pattern involves tricking the user into clicking a link that leads to malicious infrastructure.

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.ru/wix?keyword=hirens+boot+dvd+2017
- https://static.usrfiles.com/ugd/b8c837_b41ed9564edc49e481e31d1d9dac9b30.pdf
- https://static.usrfiles.com/ugd/73f3b0_1bfbc39edb604cb9b2f6a9da2e0448b1.pdf
- https://static.usrfiles.com/ugd/b8c837_6aa831ffa1ee41eca5ec82483d40b280.pdf
- https://static.usrfiles.com/ugd/16a96a_810ed761f4744e1ab1125388dab1f7ea.pdf
- https://static.usrfiles.com/ugd/b8c837_4b37cb7d5ce14beebf8bb283dede45f2.pdf
- https://cdn.shopify.com/s/files/1/0431/7764/0092/files/6717828429.pdf
- https://cdn.shopify.com/s/files/1/0440/8439/6184/files/basic_electronics_mcq.pdf
- https://cdn.shopify.com/s/files/1/0431/2816/0420/files/38534284912.pdf
- https://cdn.shopify.com/s/files/1/0428/1548/8163/files/jukekebopejuwatogizej.pdf
- https://static.usrfiles.com/ugd/b8c837_b6749ae73bce4fd8b2c312012ea23b8c.pdf
- https://static.usrfiles.com/ugd/f0e51d_002aa869ced348dfa8c3cf2f7247863d.pdf
- https://static.usrfiles.com/ugd/93971e_f1c92649bec34a4981d25b7675b50b72.pdf
- https://static.usrfiles.com/ugd/d43733_d849b3c5664a4ce5a09688bac5994a86.pdf
- https://cdn.shopify.com/s/files/1/0428/7122/6534/files/34594790197.pdf
- https://cdn.shopify.com/s/files/1/0433/4243/0362/files/mofidareravewefa.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_off00005fc2.bin` `46918b2ddba93ef7ebcb61dccf89c20b60b8476c15b5f693c5da9c62047bc351`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FC2	5144 bytes
`font_01_sfnt_off00007155.bin` `6915638fb6fc7d1ec426863c1cf6f54b4dbb5c219fe4125d777123c0c05f4c79`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7155	14160 bytes

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