Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf722499e5413b67…

MALICIOUS

PDF

39.7 KB Created: 2020-08-09 08:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f9028be26b6b6ca0e3c6b44ef5b1468 SHA-1: a3c8312c1d65ebaec8d6d1d4466a295def6fa60a SHA-256: cf722499e5413b67534e44e60b106a15cd002affe06776a02e99f420a5587009
120 Risk Score

Malware Insights

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

The PDF document contains numerous links, presented as a "quantitative reasoning aptitude test questions and answers pdf", which lead to a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=quantitative+reasoning+aptitude+test+questions+and+answers+pdf. The document also hosts a large number of links to other PDFs, likely for SEO manipulation or to obscure the malicious redirector.

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.com/pify?keyword=quantitative+reasoning+aptitude+test+questions+and+answers+pdf
    • http://files.farewellbrewing.com/uploads/1/3/1/3/131384721/c4b837faa3e.pdf
    • http://files.usafa70.com/uploads/1/3/1/4/131437139/48df3fef1.pdf
    • http://files.cvsmusic.com/uploads/1/3/2/6/132682070/xababisazux_vulub.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/kisubigasona.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/14143112891.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/86586800416.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/respironics_system_one_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/tozudemorezugapugaziweg.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/xugulixoxelifuwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/90363210389.pdf
    • https://cdn.shopify.com/s/files/1/0439/3759/5560/files/vilezunuko.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5650/files/kiwesusunevamekuvulule.pdf
    • https://cdn.shopify.com/s/files/1/0439/5335/6955/files/64711857178.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/76426874941.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_off000059d6.bin
bd7b0711188377434ad6a3871a337ee5faef712c2e2c47ef298474ea94d63a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D6 5516 bytes
font_01_sfnt_off00006cb8.bin
e0bb6b12d3dfc2dab09d0e32e354f2ef25e534d98bc4a8be35c8759fc2393cb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB8 10924 bytes

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