Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4f9badc82c3416…

MALICIOUS

PDF

38.5 KB Created: 2020-08-31 22:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ad47739e9ff7dc7b0fbb631ca56a24 SHA-1: 55cc2da985ec57af966c703c777d8bde6d71a311 SHA-256: 4a4f9badc82c34169ccc18c4592712ab4e7aa2afb6255c0d23e062927604873f
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify and static.usrfiles.com domains. The presence of a 'download button' heuristic suggests a lure to encourage user interaction with these links. No scripts were extracted, but the overall structure indicates a delivery mechanism for potentially harmful 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/pify?keyword=gift+bookplate+template+free
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/flow_bridges_9x9_level_13.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0335/files/speak_english_podcast_com_004.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/18221927212.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/fagejow.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/xobekasefesi.pdf
    • https://cdn.shopify.com/s/files/1/0462/1287/4394/files/16028708985.pdf
    • https://static.usrfiles.com/ugd/b8c837_1380a990398f4b83bc1111e9664366e4.pdf
    • https://static.usrfiles.com/ugd/fe83c3_3b55e96009144ae5a1a2edba23dadce7.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7b30d30360941fc9ee6229c55a5721d.pdf
    • https://static.usrfiles.com/ugd/dc98cc_fad46c5d79b84c6792db5f04c5c38538.pdf
    • https://static.usrfiles.com/ugd/f8de3e_7c616b806c5a4c92904ba552b353f4e3.pdf
    • https://static.usrfiles.com/ugd/353d00_0afa610d39284977815666851cdd0ef6.pdf
    • https://static.usrfiles.com/ugd/ea2f88_36e54e7e08b74c3e924fa404bce1d99c.pdf
    • https://static.usrfiles.com/ugd/0511f5_663d915520814975a6d9c24b6aa498ec.pdf
    • https://static.usrfiles.com/ugd/d43733_8d3d5c0146524e5882676d2b1952e159.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_off00005954.bin
6358bedd6203d1d7641062c64cbf3fc624546cead970eb06d90e7ade1ddbcd9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5954 5104 bytes
font_01_sfnt_off00006aa3.bin
e06b7e94b3a22346b2c66b211417d7fa252198e9b40a99461b8c529492a3b499
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA3 10144 bytes