Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf41fa868251cf8…

MALICIOUS

PDF

33.4 KB Created: 2020-08-31 02:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 645d747e9455de45770122da5ed4d340 SHA-1: 744361cc12f1a2cf29813eca5fd676a488f347f4 SHA-256: 3bf41fa868251cf88b33d32551748406817eeba4d8b4ea24af7e101b3142ca14
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, including one identified as a malicious redirector. The presence of a 'download button' heuristic and the document body containing a call-to-action phrase suggests a social engineering lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vices+and+virtues+deluxe+edition
    • https://static.usrfiles.com/ugd/2e4eb4_abb17c411d924be79f716bdd06bc7057.pdf
    • https://static.usrfiles.com/ugd/136d07_81840631a9aa4556b901e956c0225e95.pdf
    • https://static.usrfiles.com/ugd/67f5f7_f87d603beebe4fdfbca41d17f99c5817.pdf
    • https://static.usrfiles.com/ugd/628a76_897bc0e29bd347d69b4a2232f6b80bbf.pdf
    • https://static.usrfiles.com/ugd/99965f_c3c11d66ae2f4016a37a1ebec549336b.pdf
    • https://cdn.shopify.com/s/files/1/0438/6609/5781/files/vixafabegodizaredexol.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/9636388303.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6566/files/juzabebajerezawoni.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/jedotukexurizanugonarew.pdf
    • https://static.usrfiles.com/ugd/b8c837_c73477439cc14087a76c724466a4ec3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fe6bfb818604b0380d7754413a4b16e.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_off000045bf.bin
e49e3bce1281bcde96c0779cd49268dd4226c32c9e1585aa589a0b3911aa7eaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45BF 5028 bytes
font_01_sfnt_off000056df.bin
4dc397c94d6f3173e636738f1307f557434bab76b2ed3d2a939334e06523e5ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56DF 10080 bytes

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