Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb59c25b0b0f766…

MALICIOUS

PDF

43.6 KB Created: 2020-08-31 12:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4776698694a328aaf99d5807e6cb79f9 SHA-1: 443cd73f69fa34f7d0fc3af9f43f2febcd70c340 SHA-256: bbb59c25b0b0f76633a632db86e7217f9392b9a01915b131591a6e1f83c892e9
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wix?keyword=la+r%25C3%25A9volution+industrielle+4%25C3%25A8me+%25C3%25A9valuation`. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of external PDF links, characteristic of a link farm, with `https://static.usrfiles.com/ugd/79e0dc_a8ff8510b3484b6e997c86962726160f.pdf` being one of the first identified. No scripts were extracted from this sample.

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=la+r%25C3%25A9volution+industrielle+4%25C3%25A8me+%25C3%25A9valuation
    • https://static.usrfiles.com/ugd/79e0dc_a8ff8510b3484b6e997c86962726160f.pdf
    • https://static.usrfiles.com/ugd/30e015_b6ba724762fa4eb5ac85d2a21a85d640.pdf
    • https://static.usrfiles.com/ugd/99965f_25cde7b924ca46c3ad8249b1d7a33542.pdf
    • https://static.usrfiles.com/ugd/0b46e6_883529355d0148aeaabd160c11fefb3b.pdf
    • https://static.usrfiles.com/ugd/fa6f14_7af221c402304c8fa19d4b660e6dea59.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35403674757.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/lakonizesojuvuf.pdf
    • https://cdn.shopify.com/s/files/1/0460/8691/4212/files/vomal.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8280/files/varilla_roscada_catalogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/dabatoxonesur.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c6863ba88144bb3a23b51bf74ff5727.pdf
    • https://static.usrfiles.com/ugd/6f58fb_467a83fa0ed24cff82655e035c8fa7fa.pdf
    • https://static.usrfiles.com/ugd/a107db_675e8653590349fa83b3aa364c0573e8.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_2a6a2ba923964fc88c495516732126da.pdf
    • https://static.usrfiles.com/ugd/4b7290_85fcb63bd6b9442b9d3a7beca11bfd38.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e08d37e535c43a5b82f4c78f1e535e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a9b832ce99c473fb8a95568f8a7f68f.pdf
    • https://static.usrfiles.com/ugd/88a84f_7404a682e19b4b94b991c0e5cbbc7a3c.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/
    • https://static.usrfiles.com/ug

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067d3.bin
7c65a9cdc2da1b50d353bfe6f2b491b7241f678c83452d67b19d0bcf282fcfe9
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D3 5344 bytes
font_01_sfnt_off0000795b.bin
e417b1cdefdd1d03ac492dbbf546048ba3c2ed7bfa184387b80981ab3dc7bbe1
pdf-font-stream PDF embedded font (sfnt) at offset 0x795B 11660 bytes