Malicious PDF — malware analysis report

Static analysis result for SHA-256 efef64f140971ccb…

MALICIOUS

PDF

44.7 KB Created: 2020-08-02 01:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f03a8e6283c128d48371b27a59942dc4 SHA-1: dff95a08c099e05d7ba8523fc8c0985746816602 SHA-256: efef64f140971ccbc85b9618a20f4a4aab8f1f597515f6cbf7cb2f1bd08f993e
130 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Children handwriting fonts' and a URL that appears to be a lure. This URL, https://ttraff.cc/pify?keyword=children+handwriting+fonts, redirects to malicious infrastructure, indicating a phishing or social engineering attempt. The presence of a large number of PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing 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.cc/pify?keyword=children+handwriting+fonts
    • http://files.foresthillbroncos.com/uploads/1/3/2/6/132681969/levanujebijigusepoza.pdf
    • http://files.sharynjackson.com/uploads/1/3/2/3/132303024/ximasinomek.pdf
    • http://files.westerncanineacademy.ca/uploads/1/3/1/3/131383664/lobop.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/ponazevigifofuroxuxojomit.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/zimuzasir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3481/files/77076076736.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/62011190697.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/69151199269.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5030/files/rinavomexodaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/9308038812.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/78372208261.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/popemagelaxidurogasem.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/95846402755.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/8602421465.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006428.bin
989255c9dd28599b140c4ad06069a4ec03afddfe966be054bc4381360482e466
pdf-font-stream PDF embedded font (sfnt) at offset 0x6428 5072 bytes
font_01_sfnt_off00007570.bin
a425bb2de34cee3f534cff8ef00eb8a1874683de4ee096861a2431fae7143a04
pdf-font-stream PDF embedded font (sfnt) at offset 0x7570 10208 bytes
font_02_sfnt_off00009818.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9818 4324 bytes