Malicious PDF — malware analysis report

Static analysis result for SHA-256 3316d127335d8261…

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 16:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5641cd814ec07a473eb0cca43b11cac5 SHA-1: 9ac7db0d2d563c8d8b1352bbb21ed8b665ba9c90 SHA-256: 3316d127335d826101952c3d588311d19a67cae1445ac27def3f6595b092db5b
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm, a common technique for distributing malicious content. The primary malicious URL, 'https://ttraff.cc/wix?keyword=activit%25C3%25A9+rayonnement+dans+l%2527univers', is a redirector. The document also contains numerous links to benign PDFs hosted on static.usrfiles.com, likely as part of an SEO manipulation scheme to improve the ranking of the malicious redirector.

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.cc/wix?keyword=activit%25C3%25A9+rayonnement+dans+l%2527univers
    • https://static.usrfiles.com/ugd/20d83a_fa99baa327bc4d8ebc389b10f9c2e302.pdf
    • https://static.usrfiles.com/ugd/136d07_23a3c3c9319d4b2cbc3f96cbbb241d25.pdf
    • https://static.usrfiles.com/ugd/b8c837_23cbb0ad6bea40678c8891ef98565bb8.pdf
    • https://cdn.shopify.com/s/files/1/0453/8466/3208/files/71791008842.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/79519958931.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/surafomaduxotumebakaluv.pdf
    • https://cdn.shopify.com/s/files/1/0448/9238/9531/files/cable_selection.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3768/files/abs_workout_program.pdf
    • https://static.usrfiles.com/ugd/b8c837_007c84f8449f45b1aed9b09d4a4f3800.pdf
    • https://static.usrfiles.com/ugd/0a0016_8bb90381710449608ede3df95e7ec9e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c11272175974cbb830bac88bda7f0e5.pdf
    • https://static.usrfiles.com/ugd/912de2_3acb57fc1e51424c8376c21633d79015.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e146d0eb4fd48cd9c641ffc48614c7a.pdf
    • https://static.usrfiles.com/ugd/b5aed9_2e17176fadc84172bf132bc5469dce2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bcc34a0377846cb9b108c067d771ad2.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_off00006d05.bin
7b654be31902b3c2190ebd7678ddbe8def389bd56d309f9ff191325ae0e51e06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D05 5412 bytes
font_01_sfnt_off00007f17.bin
8af93c841f6ce2a9d49f684eaf5896f4573b8727ad3cc20a59f9e61054f44a2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F17 11884 bytes

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