Malicious PDF — malware analysis report

Static analysis result for SHA-256 52607ef8ec96baf8…

MALICIOUS

PDF

37.8 KB Created: 2020-08-24 21:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62f2b9b2b34c85200180ecf00834da76 SHA-1: 68d9c5cbf1c6ed976b882508c7bcee92f915e623 SHA-256: 52607ef8ec96baf8b2d4da4af6798cdf82d113996d58b1eede8342da9f77917f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same redirector URL and a reference to a 'zelda botw interactive map', suggesting a lure to entice clicks. The presence of a link farm and a malicious redirector indicates a phishing or social engineering attack.

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/pify?keyword=zelda+botw+interactive+map
    • http://vemoranur.bedfordhikingclub.com/uploads/1/3/0/8/130813835/a7acca3c.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0074/files/best_reader_for_windows_7_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/batetawoseluj.pdf
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/jebajute.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/lagujujisediri.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/72053861397.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/altar_of_siena_b1f_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/1300/5724/files/46313974651.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/bezier_curve_in_computer_graphics.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/65222570340.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/discord_chat_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0429/5612/8412/files/55805656125.pdf
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/83798748377.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/battlefield_5_firestorm_size.pdf
    • https://cdn.shopify.com/s/files/1/0436/6408/1046/files/86627530364.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_off00005566.bin
1b7a352c17a981710acb1e77a7def5d2987e200d668aaf8c537521d3f0e07991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5566 5292 bytes
font_01_sfnt_off0000675d.bin
7693ff1e535dcc61b6a4dde51422a4ab871f6a1f697bfb081bea68b438f1a587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675D 10280 bytes

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