Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca94b4bf40b0084…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 20:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b8dd677d5fc9d8c21a5cdefc6253b6b SHA-1: 2937d0d54ffe23bcac9a72687501b6088e16133e SHA-256: eca94b4bf40b0084df14502ae69366c5ebe0875c6e07d0aed358483d0ff00ed1
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link. It also contains a large number of embedded links, forming a link farm, with the primary malicious URL being 'https://ttraff.cc/wix?keyword=os+significados+do+letramento+angela'. The document body is heavily obfuscated but contains this URL and other PDF links, suggesting a lure to external content, potentially for phishing or malware delivery.

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=os+significados+do+letramento+angela
    • https://cdn.shopify.com/s/files/1/0440/2210/4229/files/4583777483.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/background_color_jspdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/62632300944.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/physics_for_scientists_and_engineers_knight.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5819/files/77928001572.pdf
    • https://static.usrfiles.com/ugd/c0b427_c340f0787da444b6b3c08bc0a31a67e8.pdf
    • https://static.usrfiles.com/ugd/d54300_11d034a2cc524990a3a49e52cb6ab969.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7786/files/accounting_equation_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0301/0468/files/murutedoturebutevumaputip.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/bozakovibimixo.pdf
    • https://static.usrfiles.com/ugd/625844_2688fb42fc6842d19beecc45ffe05ed4.pdf
    • https://static.usrfiles.com/ugd/b8c837_771c7bb782ae4ffabacd897664d6389f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad48726b5648439ab486b0fba9586ab7.pdf
    • https://static.usrfiles.com/ugd/04e6f9_355aa8343dee49e486295bcb143ea876.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff5aeca11c9247659be54c6bbfbfa767.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_off0000666b.bin
9c5f4371c167d98dfb498497a3e5c7c658c2b9f78e955a8d2308b52d03ef7715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666B 5368 bytes
font_01_sfnt_off0000788d.bin
6a1acd9afe3427d492c5f19a172733753174e63cbbbed3b2757678aa55be2c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788D 13912 bytes

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