Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c429b7284551577…

MALICIOUS

PDF

47.0 KB Created: 2020-08-30 08:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43c9c631c37f612f4e5515fb2f972352 SHA-1: f2339c66f13cac55b5a452fa2a2cdeae5551392c SHA-256: 1c429b72845515776690f08cb84b7f3b2d639074b5168ab7d2848201f88ae08e
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, some of which are benign Shopify links. A low-severity heuristic indicates the presence of a visual download button, further supporting the lure. The primary malicious IOC is the redirector URL, which likely leads to further stages of infection.

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.club/wix?keyword=liberty+bin+sachivalay+clerk+book+pd
    • https://cdn.shopify.com/s/files/1/0434/6534/3138/files/ragirukanuwusovanoluzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/54095368306.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/fonosufelobotolafepibir.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/79614176299.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0e3ef11d18d40e08e4589f0ec716641.pdf
    • https://static.usrfiles.com/ugd/b444d4_abe19f9e704e46018988bc4330cf9d93.pdf
    • https://static.usrfiles.com/ugd/be19e1_77128cd29371498da873b0b8125f9213.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c54bd2ae6154264994c4dc68574f727.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/vulofewad.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/82049476007.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/dapuvejijapub.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/favuwotalezixa.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_off00006255.bin
294d5586816f8fbc2ab2612840af907a4f418efed9574da1458cd620e7d2b052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6255 5468 bytes
font_01_sfnt_off000074e4.bin
1095a591e146d069673b500cf2c5ffc0824ff014703feb104e129a13a9ca1de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 9980 bytes
font_02_sfnt_off00009757.bin
075656c72dca30d9e57d0de271cf94a50ba3091bdcf0d4292094857203744674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9757 16764 bytes

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