Malicious PDF — malware analysis report

Static analysis result for SHA-256 41487b67976b5c57…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 21:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8772b1cd0a7be8961fe79e8ce46de9b6 SHA-1: f84d3a9702f7f7069d43e16f395fcbfaf70798f3 SHA-256: 41487b67976b5c57156a83c0b61a676efec44ad8ea33f2a83124b529fe79c181
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=a+brown+girl%2527s+guide+to+gender+poem+lyrics'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to static.usrfiles.com. The document body, though heavily obfuscated, also contains the malicious redirector URL and several benign-looking PDF links, suggesting a lure to a malicious site.

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=a+brown+girl%2527s+guide+to+gender+poem+lyrics
    • https://static.usrfiles.com/ugd/b8c837_f6454569ec054182aca7b573c3613ff6.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a6b4234fe5b40cf8267ac9d5b319ead.pdf
    • https://static.usrfiles.com/ugd/b8c837_babffb207e8143ed8cd33ab84d595b2a.pdf
    • https://cdn.shopify.com/s/files/1/0435/2085/2122/files/jipavigodikimosozezilaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/agronomie_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/9518/5824/files/fesufidaparazumisor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/babazibinalamulaxizop.pdf
    • https://static.usrfiles.com/ugd/4c1554_0c885204304d497987842975ca8dc319.pdf
    • https://static.usrfiles.com/ugd/b5aed9_3803a42c54c04722b4efed2f2b32273a.pdf
    • https://static.usrfiles.com/ugd/b8c837_161157c80ca949628ceda4d1d843ee1f.pdf
    • https://static.usrfiles.com/ugd/6908d7_d3b9f2c5095f48b98fd15c8e751bc00a.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/wilagijukini.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/bugupapipofubatusug.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_off00006147.bin
f0e5e59cd70a95ce064fc4129f8097ed02f19b60eedf537d714e1e2812c7e10e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 5540 bytes
font_01_sfnt_off00007417.bin
1337809bfc62f907b9a666b6a22163fbf26c68a9829d737c78f2cdea46db7e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 2600 bytes
font_02_sfnt_off00007f7d.bin
b42294d0f44b189528490d242ed649598bd0fcad8e565c2846350fa5f449a484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7D 10732 bytes

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