Malicious PDF — malware analysis report

Static analysis result for SHA-256 d761547a7aded5a8…

MALICIOUS

PDF

45.7 KB Created: 2020-09-01 02:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90f816da5a749f7f6517b77d635243ff SHA-1: 0360c3e8238f40b0e3dfa61e87b36310220a1b2f SHA-256: d761547a7aded5a8386279856c2d35f74b6c57fc2862eb1b57b3837e0383e324
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, specifically pointing to 'https://ttraff.com/wix?keyword=amped+wireless+r10000+manual'. This URL is embedded within the document's body text, disguised as a manual for an 'Amped wireless r10000'. The file also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to static.usrfiles.com. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

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.com/wix?keyword=amped+wireless+r10000+manual
    • http://192.168.3.1Open
    • https://static.usrfiles.com/ugd/804ff6_a0732f38fc2d45288902c1f9ce8b7943.pdf
    • https://static.usrfiles.com/ugd/e3ff21_667bc0c8c87d411dacc46f7c0ff10be9.pdf
    • https://static.usrfiles.com/ugd/cafc24_9fe9bec5a3764c74a0a1f716519a9eef.pdf
    • https://static.usrfiles.com/ugd/b8c837_71205bbc53eb4b099c60c9424b31e795.pdf
    • https://static.usrfiles.com/ugd/f63f29_07038497b6ea4f08bc08e68a4f6a3e2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_666dccc875de4a9b890f7e5c2c0f4a59.pdf
    • https://static.usrfiles.com/ugd/913720_b1623e556c774c7e8f25ac1fc8c3a461.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/rulewedokoduzukubuzosiko.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/maxekutiwobu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5406/4028/files/judupem.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/minnesota_wild_media_guide.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.

FilenameKindSourceSize
font_00_sfnt_off00006262.bin
edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 6440 bytes
font_01_sfnt_off00007258.bin
d1fee0aa35c5bc731d828e2a387da10aafdfc93247276d94688cdac6a5f14844		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7258 5380 bytes
font_02_sfnt_off000084a0.bin
1347d480afd318089c68425d447c93aad476ee2672b18ae0c575b0422af2a0b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A0 10864 bytes

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