Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ffcf8fe8b396aa…

MALICIOUS

PDF

40.9 KB Created: 2020-08-01 05:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 672d2615ae7ff97b51401a67f3c385d9 SHA-1: 670ab0ea708fcdf1ec38d86fd6109c2035e26dd4 SHA-256: 52ffcf8fe8b396aa8e253288bd66951c698a13967169da59caa837cc0ad29292
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting other PDFs. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, directing users to 'ttraff.ru' with a book title as a keyword. This suggests a phishing or scam attempt using a link farm to obscure the malicious destination.

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.ru/pify?keyword=night+by+elie+weisel+online+book
    • http://files.thehwt.com/uploads/1/3/2/7/132710596/c6ba9c1.pdf
    • http://files.jonathanedgingtonwriter.com/uploads/1/3/1/0/131070113/pujomilun_kepaf_wozukas.pdf
    • http://files.karlielucas.com/uploads/1/3/0/8/130873921/1936102.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/xakeba.pdf
    • https://cdn.shopify.com/s/files/1/0428/4320/9895/files/16843565952.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/xaziwovupedugubujil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0163/files/gifoxenug.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/zupisotokupugalesazuwal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7256/files/16172813685.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/fiwujidurasotez.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/10652725767.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6140/files/77880663403.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/80464895382.pdf
    • https://cdn.shopify.com/s/files/1/0441/2253/8136/files/93636539138.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/57907730474.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/35295266424.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_off000063bf.bin
3b7050af318d55c363f6ef8af7b8fa7ac96fe5817f1cf7d41155cb6ef3e5c56d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BF 5008 bytes
font_01_sfnt_off000074ef.bin
637b085d54fe809ab4e273fbbca2530b4423c46bac9a6777556f6b032c0216e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EF 9848 bytes

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