Malicious PDF — malware analysis report

Static analysis result for SHA-256 c998dfcc5700c772…

MALICIOUS

PDF

40.1 KB Created: 2020-08-01 10:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bf361c9fb83fa1c002906fe9f57442c SHA-1: 99a2cff31124ab6a081b1e8c31398e7784aae323 SHA-256: c998dfcc5700c7725571c85dca31d19c39ca000f8f7a6014fdec5d04d3eff2ad
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1566.002 Spearphishing Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a reference to 'gdiplus dll missing', suggesting a lure to trick users into clicking the link. The PDF also contains a link farm heuristic, indicating a large number of external links, with the primary one being a Shopify hosted PDF. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.cc/pify?keyword=gdiplus+dll+missing
    • http://files.theirisharthistorian.com/uploads/1/3/1/4/131438460/7866956.pdf
    • http://files.blueactiondems.com/uploads/1/3/1/4/131406518/netofesabot-tolisanajop-fajuzegedibekig-newirurufi.pdf
    • http://files.ltapostolic.org/uploads/1/3/2/8/132815003/9044970.pdf
    • http://files.snohomishminigolf.com/uploads/1/3/0/7/130775837/1857974.pdf
    • http://files.resvideoandmedia.com/uploads/1/3/0/7/130739697/af948315f6a.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/87057347287.pdf
    • https://cdn.shopify.com/s/files/1/0437/8053/8529/files/kavakavugowetovizatuwix.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/the_scrambler_full_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/39771984375.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/40426451700.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/kazepizavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/55881522922.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/bepizotalele.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/27977697998.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7183/files/65270844233.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/50338533850.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/4064732039.pdf
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/kipulizivonufanubamupad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/rosesimoripakovonuf.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_off0000603a.bin
442e1156a7aec77694dc85e8e883bef2692b245500401faa043c8d5654c2800a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603A 5004 bytes
font_01_sfnt_off00007138.bin
1d13b0eace1c0b1ac18d056387cfc53e1073f9744f2e29799a0264c9aea691ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7138 10096 bytes

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