Malicious PDF — malware analysis report

Static analysis result for SHA-256 992f8cd8d647bf3c…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 03:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9171c5ecd40e82cb690a7c3802e6d8cf SHA-1: d54c53432e4e870d32b02d0bddc53b6189ffb960 SHA-256: 992f8cd8d647bf3cbd048f45d3e5d0e059d9f29cd56e129aa1b65ff40c359769
120 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with many links pointing to benign Shopify domains but one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the text "Systematic review handbook pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious URL is https://ttraff.com/pify?keyword=systematic+review+handbook+pdf, which likely leads to further 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.com/pify?keyword=systematic+review+handbook+pdf
    • http://wupafore.bundles4babies.org/uploads/1/3/1/3/131383657/77486.pdf
    • http://files.netbenefitusa.org/uploads/1/3/1/0/131069950/6004021.pdf
    • http://files.e3embedded.com/uploads/1/3/1/4/131438067/miwevagi_begufura.pdf
    • https://cdn.shopify.com/s/files/1/0428/9927/5935/files/kederudatirewefogesariz.pdf
    • https://cdn.shopify.com/s/files/1/0439/9444/8030/files/kesozobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0325/6737/files/acute_lymphoblastic_leukemia_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/ferusizaxexodegulabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nosisuzamozozi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/pixuniv.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/dead_poets_society_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/28792791014.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/6th_grade_reading_comprehension_passages_with_multiple_choice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/1977/1799/files/dorekolatiguxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/lijuropavimatibulo.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_off00006103.bin
9fefb4f4c924150bd6e127ca2dc7da362d14f17a9de658204a76f3e47667bc09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5924 bytes
font_01_sfnt_off00007514.bin
d211bae821c762ceb26057cc94a8a56d175b8e13a78315d37448e979258e3c0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 14996 bytes

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