Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5377ec5134a242…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 22:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a213ab61b59a47b9ebc8cf10c3ac13c SHA-1: b3301b553f69516e2551cc15c3a3df6ee2485ee7 SHA-256: cd5377ec5134a242eef5d8b49178fb2ddfc236791d4b2f56826811325e6338c7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to malicious content. The document body, though partially corrupted, contains text related to a video search query, suggesting a lure. The presence of numerous PDF links and a malicious redirector indicates a social engineering attack aimed at directing users to harmful sites.

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=i+ain%2527+t+your+mama+video++mp4
    • https://static.usrfiles.com/ugd/b8c837_4d30eb72c1cd403f8d412663ef2052de.pdf
    • https://static.usrfiles.com/ugd/0047a4_0c7311f595ea46f197f22ea503130812.pdf
    • https://static.usrfiles.com/ugd/e4a001_ad8544fe5bd745929f09b5f69c1a0fef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/rinutowabe.pdf
    • https://cdn.shopify.com/s/files/1/0458/5973/3657/files/preposition_of_time_worksheets_for_grade_2.pdf
    • https://static.usrfiles.com/ugd/58a813_98ec29de52e14950a0011a965cddaa1d.pdf
    • https://static.usrfiles.com/ugd/b910ae_b7e51891ef464efb8135938e330636d8.pdf
    • https://static.usrfiles.com/ugd/930050_e67a3b22c45d435286a12bd2e73a7ae0.pdf
    • https://static.usrfiles.com/ugd/b8c837_29702eee934542ef97ce5f83ed0a6068.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c45.bin
abd4a7f36805ec9b55bd55a12e53c15ddffaed4af020a5a8595195cf1c9eed53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C45 5000 bytes
font_01_sfnt_off00004d3a.bin
b0fbc98132c74e48969319820a444ea2d917eacb9343b8dd8057682e2a7209a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3A 9128 bytes
font_02_sfnt_off00006cc0.bin
dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 18776 bytes
font_03_sfnt_off00008a27.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A27 4324 bytes

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