Malicious PDF — malware analysis report

Static analysis result for SHA-256 53715634d54db3f2…

MALICIOUS

PDF

83.0 KB Created: 2020-08-23 22:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f84fcb9c548b0327de45b9fb36fa04 SHA-1: a1ead4692e284ba4153d90dcab94a4b4db0b92c6 SHA-256: 53715634d54db3f2406854d5b57b68c335a19f6759f20b88c7882afedf24724e
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of the primary links, 'https://ttraff.com/pify?keyword=apa+citation+reference+sheet', is flagged as malicious by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to potentially harmful 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.com/pify?keyword=apa+citation+reference+sheet
    • http://files.thechildrenscottagefortmill.com/uploads/1/3/2/8/132816066/25d87f8f43c3.pdf
    • http://files.in2improv.org/uploads/1/3/0/9/130969910/kojuwodela.pdf
    • http://files.shootingstarbotanicals.org/uploads/1/3/0/8/130814907/5059258.pdf
    • http://files.lighttherapyinternational.com/uploads/1/3/1/4/131453267/nodekogutatamef.pdf
    • https://cdn.shopify.com/s/files/1/0433/7742/6584/files/budebelarenerujiravofupi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4702/4805/files/8421291016.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2829/files/earn_to_die_3_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/gelorevemedo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/foxyutils_merge.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/79475743500.pdf
    • https://cdn.shopify.com/s/files/1/0429/3984/2719/files/risutabelowawitivitusipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/aptitude_questions_and_answers_for_campus_placements.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0784/files/godisepegipawula.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/62667556444.pdf
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/cellink_battery_b_manual.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_off0001084b.bin
09efdd79d4964a113eb6d60bb6615c191844903606b8899ba47631baa2fc5763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 5060 bytes
font_01_sfnt_off00011972.bin
7aa46175d5a61ac6c6573e076a42ec38b6eb4655a39406f98b01007c4c972369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11972 11012 bytes

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