Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b4f9c2d80e8038…

MALICIOUS

PDF

37.0 KB Created: 2020-08-30 14:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 894c34cc912ab15194ca94087b8a6bf3 SHA-1: 786632f9bd33666d9b0e1cbfe497f295f2a19bb5 SHA-256: 36b4f9c2d80e80380a1232f39507e0fa78ddc5b80a222c0a58668aa165dbe841
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, https://ttraff.ru/wix?keyword=miscrits+world+of+creatures+game+online, points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to external, potentially malicious, content. The primary purpose appears to be directing users to malicious sites through a deceptive link farm.

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=miscrits+world+of+creatures+game+online
    • https://static.usrfiles.com/ugd/bdeb4c_4c2bbf297e234b318982aad705c26d64.pdf
    • https://static.usrfiles.com/ugd/b8c837_8895a66aa5e94c0aa5629c65ffb013c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_686d7e1507834feaa6062da4f1634f69.pdf
    • https://static.usrfiles.com/ugd/b8c837_3af8dde4ee5e4547b5be98e8cbea9cf0.pdf
    • https://static.usrfiles.com/ugd/895bef_512743c2273d48d0b26b342e31f47b2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_550b66e1cead48ff8e3451b63a69ed27.pdf
    • https://static.usrfiles.com/ugd/74c34a_4db144d64b6c4bafb99ea8102f06fcde.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bf4c146d25743d1b72ffe676366da53.pdf
    • https://static.usrfiles.com/ugd/0aab01_adf0de15dada4271a7e91641ce65b8fa.pdf
    • https://static.usrfiles.com/ugd/50de67_356645414dc8438b95593848f7b0a5dd.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6429/files/hypertension_guidelines_2020_summary.pdf
    • https://cdn.shopify.com/s/files/1/0432/1099/7921/files/2828396425.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2004/files/xabukilogafidolugereb.pdf
    • https://cdn.shopify.com/s/files/1/0435/4536/2591/files/science_lab_equipment_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/79564303850.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/vekono.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/vitedopubulume.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/57358299073.pdf
    • https://cdn.shopify.com/s/files/1/0432/7456/7833/files/genijizizusomifote.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/14464931146.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_off000050ad.bin
509436cab21c583376338a4268329aa62c47bfa5512d49bd64e8919ae9965b16
pdf-font-stream PDF embedded font (sfnt) at offset 0x50AD 5440 bytes
font_01_sfnt_off0000632d.bin
25d659538e3d7361177433a9183cc3b7c92fa7a1ecdf41d6f043e1dff80cf634
pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 10432 bytes