Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f40c3c1372f88b6…

MALICIOUS

PDF

45.2 KB Created: 2020-08-13 00:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71cdf5f2ee216ffc3fb6f70f5164758a SHA-1: 3da0f46defedce78a588f674dee0fa5bdbce88ec SHA-256: 4f40c3c1372f88b6b2e6db9662f7e47322de3f4ed1bdc85216052265664ba2ea
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=automobile+engineering+interview+questions+and+answers+book+pdf'. This URL is presented within the document body, disguised as a link to an 'automobile engineering interview questions and answers book pdf'. The document also contains a PDF link farm heuristic, indicating a large number of external links, with the primary one being to a Shopify domain. The primary malicious URL is the highest priority IOC.

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=automobile+engineering+interview+questions+and+answers+book+pdf
    • http://files.jonathanlumsden.com/uploads/1/3/1/4/131454306/bofunuwetu_sodepowig.pdf
    • http://wuxovutov.tonamsausage.com/uploads/1/3/1/4/131453134/xesapojigujofus.pdf
    • http://files.blueheronherbary.com/uploads/1/3/1/0/131070230/zebog_wurasa.pdf
    • http://files.rchristianminson.com/uploads/1/3/0/9/130969146/4adfa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2113/1161/files/25373704139.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/14975436180.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/janibuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/murekubixomoketijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/puxosujuwozujolega.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/metro_route_map_delhi_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/1743/6312/files/vetogo.pdf
    • https://cdn.shopify.com/s/files/1/0447/9251/2678/files/felopoxajuvamaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/mojagumanebad.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/zikubawid.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7424/files/wigexumekawidasibisan.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/thus_spoke_zarathustra_summary.pdf
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/critical_reading_and_writing_skills.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/zawoxurokujiwizivedox.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_off00007071.bin
683ab16c481defbc8c98f76b825ece3ab5ff8a5e2ce3c7e10fccdc4e4d20d408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7071 5832 bytes
font_01_sfnt_off00008444.bin
f56ff96e7a1db69854ab595bff69419a0aa3755e0c07452b0d9615a47c44bd16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8444 10224 bytes

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