Malicious PDF — malware analysis report

Static analysis result for SHA-256 919a322a2f020b07…

MALICIOUS

PDF

40.9 KB Created: 2020-08-18 23:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d6d106081415357939987a5aa9bb82c SHA-1: 110aded1e6d89a0ccbd9588825c84dcc87ecdc81 SHA-256: 919a322a2f020b073075cc19b82c6bb3bdcac590b946c1d9cc57409ae80aca77
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a link to known malicious redirector infrastructure. Additionally, another critical heuristic detected a mass external PDF link farm, with many links pointing to shopify.com domains. The document body contains the URL 'https://ttraff.ru/pify?keyword=jeopardy+questions+and+answers+archive', which is likely the primary malicious redirector. The presence of numerous links suggests an attempt to manipulate search engine results or lure users to malicious content.

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=jeopardy+questions+and+answers+archive
    • http://files.johnreesleather.com/uploads/1/3/1/6/131637658/f394e2.pdf
    • http://files.cm-miller.com/uploads/1/3/0/9/130969012/wobodolurajog.pdf
    • http://files.divinehorsetack.com/uploads/1/3/0/7/130775297/gozagas.pdf
    • http://kufutinoj.daniellovesdogs22tv.com/uploads/1/3/1/4/131408899/tejuzamotise-xiwawemogi-fudaxuwes.pdf
    • https://cdn.shopify.com/s/files/1/0438/3057/5266/files/1419793257.pdf
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/esl_animal_crossword.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/rujanoma.pdf
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/30309055622.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/42052622139.pdf
    • https://cdn.shopify.com/s/files/1/0431/6296/0023/files/76721728198.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/38269916003.pdf
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/xixodelesibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/united_states_chile_free_trade_agreement_certificate_of_origin.pdf
    • https://cdn.shopify.com/s/files/1/0440/5926/3141/files/gaverikexet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/76578982317.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_off00005fdd.bin
a38ab64bf2aaa64c632e8e150f61ddde5dfc11cc0a70bf58d531c0da5f78e541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 5496 bytes
font_01_sfnt_off000072a6.bin
2f13498c353727c82a0094f369000b12f494a798f4675266965c468a2b38a227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 10648 bytes

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