Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d6dbd580a4c82d…

MALICIOUS

PDF

42.2 KB Created: 2020-09-01 15:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4774dbe32cbcd7cb8fc831005d210e3d SHA-1: 358e16271b54a131b8051a1240524b4f769af260 SHA-256: 28d6dbd580a4c82dfe0a423ffc6c979aee2fe412eb1dbdd0018f358a9e23b2ac
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is an instruction manual, which is likely a lure. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, further supporting a malicious intent to redirect users.

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=smok+nord+instruction+manual+pdf
    • https://static.usrfiles.com/ugd/a771bd_e3cbf6408a5746d4a5259da213cbe9c2.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_044347fa5838464c935cebc51ea76fdb.pdf
    • https://static.usrfiles.com/ugd/5e8de6_81b486d9b4dd47a9a8ac53a00320caef.pdf
    • https://static.usrfiles.com/ugd/de02f3_cf7b652dd0074752964743e1554d5469.pdf
    • https://static.usrfiles.com/ugd/54fa57_27b122e44ecf4745b3146ad04b41504e.pdf
    • https://static.usrfiles.com/ugd/e73fea_dc89a82f799545dfa3e073d2adecc11a.pdf
    • https://static.usrfiles.com/ugd/fe83c3_eb58ebc739d84f548b93abd94c653481.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_a7973772c3764a9491dfd2510dbd1e1b.pdf
    • https://static.usrfiles.com/ugd/2ca22b_0a638ab61a06460fb871d24dc1552d4d.pdf
    • https://static.usrfiles.com/ugd/277b62_35e264fdf035488fa08b5b49b0818bde.pdf
    • https://static.usrfiles.com/ugd/b8c837_e13da048f9344248bcfe33ac53382547.pdf
    • https://static.usrfiles.com/ugd/c0b427_07235ac48ecc43aaa7addad4458d0e0a.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4432/files/rokifesepaponiledirujoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/xatepebaj.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_off0000665e.bin
08a399f52747d524a1d86f60adc533c4147c83a452a7b0c6dbf38cedf5c72b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665E 5468 bytes
font_01_sfnt_off000078e4.bin
51d9dc0bdd6c5608deaed5907f6f7e897f0dc5c71bbbebef0c40402008a41846		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E4 10416 bytes

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