Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53649452e712ae7…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 10:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f19da47f3060390ec5d5150af75fcaa SHA-1: 302e74c7b214fc50ab340a10e63f3bc0aa3be76e SHA-256: b53649452e712ae7c67bf868c0d96dc5435742c1e5e4bcda15f7fb81945a49b2
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading content, reinforced by the 'SE_DOWNLOAD_BUTTON' heuristic. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to a secondary malicious download. The presence of numerous Shopify links, while many are benign, suggests a tactic to blend malicious links with seemingly legitimate ones.

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/wix?keyword=drake+views+from+the+6+album+zip
    • https://cdn.shopify.com/s/files/1/0432/7440/3996/files/roblox_download_loop.pdf
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/byomkesh_bakshi_samagra.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/zagubefufikigadilakino.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/alleluia_magnificat.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/40920779652.pdf
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/40435054629.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/gopro_5_quick_guide.pdf
    • https://static.usrfiles.com/ugd/d55797_49d57c062920409199247891579327aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7fc493d645d4e258e8e312978b99f82.pdf
    • https://static.usrfiles.com/ugd/173616_920dffbe789f4393afb5867a0e070cbf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4610/files/81057262268.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/antioxidant_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/the_odyssey_book_10.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_off00006415.bin
165d07983e0344b6c1908af231576b059594ceb007d4acdc6a7599eaaf83fa60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6415 5700 bytes
font_01_sfnt_off0000776f.bin
6bc36d7ff25287edd8e8b3812cee140117d61c8f68e82a164e7564494c7ab8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776F 10496 bytes

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