Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50509b1af6ca8d0…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 06:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 455ca5152309b6cdadf40d136a10d020 SHA-1: 652e5884633076fc7b5ef673d273c7352b12305a SHA-256: a50509b1af6ca8d057024b0b470656d43aaafccde94eb02a58021ed36759d140
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, identified as a link farm, with the primary link pointing to a known malicious redirector. The document's content is minimal and appears to be a lure to encourage clicks on these links. No scripts were extracted from this sample.

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.ru/wix?keyword=la+cellule+animale+et+vegetale+pdf
    • https://static.usrfiles.com/ugd/b5aed9_46089ec1d41e4240a65f1e1ae388701a.pdf
    • https://static.usrfiles.com/ugd/217d68_437ab46878d3498b82f48601036ab735.pdf
    • https://static.usrfiles.com/ugd/e42ee3_d0b223d5421b4ee18f71909740973287.pdf
    • https://static.usrfiles.com/ugd/1be480_3c0b4d0898fd45b6a98f967e08c167a8.pdf
    • https://static.usrfiles.com/ugd/5b5da7_0a7e9c9457e34c49828ac1932aa85273.pdf
    • https://static.usrfiles.com/ugd/eda9ba_5d317e705cbe43aaab65b3bf6813dcdd.pdf
    • https://static.usrfiles.com/ugd/aff7ca_33925dc04b864d59980bbde9f12c21fb.pdf
    • https://static.usrfiles.com/ugd/d775a9_79f9b205302d4f0c99d221d4be32453c.pdf
    • https://static.usrfiles.com/ugd/b6edda_ace846c8f75f4d26b3a79811b57f0e42.pdf
    • https://static.usrfiles.com/ugd/f1780b_9173fbeb62ff4990965a10cbc935343f.pdf
    • https://static.usrfiles.com/ugd/ac51ce_1bd798a82f6641e7b4d6678aad1afccb.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_off00006ae2.bin
62bbdda361f171df0f40768de85a14b842a7a27844811bb06e6ca334e042a5ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE2 5200 bytes
font_01_sfnt_off00007c8e.bin
29cf77d631cea63681796bb33605dbd942411bc33e2729fd0760b3d80bb998a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8E 11620 bytes

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