Malicious PDF — malware analysis report

Static analysis result for SHA-256 872dfb2f7bcd40f2…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 19:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ea7197da0f42079248fc2724685e0e1 SHA-1: 85edaf4f4c7c5be1ccfbc38df2dd78ba48599d37 SHA-256: 872dfb2f7bcd40f283f46d12eaf851beeafe04a3f0846fe6f04e6c0cf9f54cfb
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, likely intended to deliver malware or facilitate phishing. The document body, though heavily obfuscated, contains the text 'general admission torrent' and the malicious URL, suggesting a lure for pirated software or similar content. The presence of a large number of external PDF links further indicates a link farm used for SEO poisoning or distributing malicious content.

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=general+admission+torrent
    • https://static.usrfiles.com/ugd/b8c837_bdacf10884604719b5fe5f97e6c3203c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d64aeb2fd244f58acb219daefbb57bf.pdf
    • https://static.usrfiles.com/ugd/5af86b_397061bb2359442f994c1ab0d8746f16.pdf
    • https://static.usrfiles.com/ugd/362633_15bfce5290e54a41a57bfc807183b60d.pdf
    • https://cdn.shopify.com/s/files/1/0433/2804/5209/files/22941024732.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/silekizezimepajetidomok.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_8da26b5155d243c6950d16027e10a9e5.pdf
    • https://static.usrfiles.com/ugd/b47706_7ac57efbcf3743498b550599d3a45f2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3af5c0010434d28bc4af6c163e6b6a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_da713ef5824e4835ada86ddc9f8d35a9.pdf
    • https://static.usrfiles.com/ugd/87d215_79321a89e4e1440eb3b3c770a662d565.pdf
    • https://static.usrfiles.com/ugd/9e53d4_50c0a8e3f32343719cb56af93e2307ba.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_off00006557.bin
55634d2e1039042697582b3d7e8a6ae657a86235a2cfcfdb6c690f806501faa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6557 5004 bytes
font_01_sfnt_off00007642.bin
69d2bfbad38360017293a51828176131ca522aa2ffda5e60a4e16adee8a3fb43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7642 11524 bytes

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