Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ae9ee291f9717f…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 10:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e76e3171abcf67eaa8f04e3c965b9f6 SHA-1: 82dcd9e989b003b9d6f21d5ee18806beeacef07a SHA-256: 40ae9ee291f9717f2d96c08c9c2e6461dda7792c9220913f0b96f44d3c722650
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a large number of embedded external links. One of these links, 'https://ttraff.ru/wix?keyword=the+ventilator+book+william+owens+pdf', points to a known malicious redirector. The document body contains garbled text and also repeats the malicious URL, suggesting an attempt to disguise or amplify the malicious link farm. The primary attack pattern involves luring users through a link farm disguised as search results for a book.

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/wix?keyword=the+ventilator+book+william+owens+pdf
    • https://static.usrfiles.com/ugd/ca9b0a_b339f14b692748a9ab72fd219596332d.pdf
    • https://static.usrfiles.com/ugd/b5472a_cafee6b86e1e469a89e4c71f4e3f2c4c.pdf
    • https://static.usrfiles.com/ugd/432b07_ec1c417c4b5d46b5b29fee3595fa3b38.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/vavejotokazojatafafivaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/basketball_half_court_diagram_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/ganeguguruwunexetani.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/30739176486.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5910/files/jagotus.pdf
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/wapabixozojuvenorufo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1772/2266/files/64674874690.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/77099977584.pdf
    • https://cdn.shopify.com/s/files/1/0451/2278/1337/files/captain_america_new_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6002/files/zavawirosezomogefomivejeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/zadutejemuboziwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/76142386381.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/jututegidotepofu.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_off00006549.bin
c1910a2481daee29b818f7a8e9529213ddee68b649139a7f6d9b722e84121208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6549 5584 bytes
font_01_sfnt_off0000782d.bin
690bc229b0cd41cfc046a02dcb7b6f4371b3f3bfc2519e752f4ac1accaf918d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 10092 bytes

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