Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05b6ddd024380ec…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 05:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7343da116c73f4daba60be11bec686db SHA-1: 3c9f7aa66c081912d2b30f759be9e1ba4baa77be SHA-256: b05b6ddd024380ecc7b83bd5ece9555147f943bb6160083400a5e90387e122f9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates a malicious redirector link, and the document body, though partially corrupted, contains text related to 'Nexus mods download speed cap remove' which is likely a lure. The embedded URL 'https://ttraff.cc/wix?keyword=nexus+mods+download+speed+cap+remove' is the most critical IOC, as it leads to malicious infrastructure.

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=nexus+mods+download+speed+cap+remove
    • https://static.usrfiles.com/ugd/7baf93_7f4d73cfb1fd47139a3e20d1aa665c05.pdf
    • https://static.usrfiles.com/ugd/aef5b7_2102f982dbd74cdcb3438a825cef3a89.pdf
    • https://static.usrfiles.com/ugd/405339_b00d8238eb854d46a75ebc2d9425ab2b.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_b89e5d3e4e1d4d7a855628b33e9e287e.pdf
    • https://static.usrfiles.com/ugd/b8c837_815dbac699ec4db3914610e97b1382aa.pdf
    • https://static.usrfiles.com/ugd/238140_c688ae89907d4855a2f18855db018e56.pdf
    • https://static.usrfiles.com/ugd/b8c837_381b546bdefd495399c4dd11be544532.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/nabof.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/jovobixawomagunemu.pdf
    • https://cdn.shopify.com/s/files/1/0455/3677/2261/files/background_power_point_simple.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/zubed.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/leadership_and_leadership_skills.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.

FilenameKindSourceSize
font_00_sfnt_off00005fad.bin
b4d4b744e38649ee8aa700eb0c82b382a814d8c378f2942e65eeb29935050182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAD 5408 bytes
font_01_sfnt_off00007217.bin
6f928ebd6f0d3ef041a08f3e28566e7a49318a4a899fe118dd80a41102b18614		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7217 10104 bytes

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