Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f15e8b5b7afe5d6…

MALICIOUS

PDF

40.9 KB Created: 2020-08-10 00:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fe94a2ae513a45e629bc1897d3acbee SHA-1: 656ac1956bfd57f531f96080237a6a5b5bbc0c4f SHA-256: 1f15e8b5b7afe5d690c0d8996c122935bd7c64445c5461b8d7b25de6f4b6f795
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector at `ttraff.ru`. This redirector is disguised with a keyword suggesting French language learning materials, likely to lure unsuspecting users. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site or download further malware.

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=apprendre+le+fran%25C3%25A7ais+d%25C3%25A9butant+pdf
    • http://files.johnsonsguns.com/uploads/1/3/2/7/132712234/lokoguv.pdf
    • http://files.idahotaxidermistsassociation.org/uploads/1/3/0/9/130969364/5481948.pdf
    • http://regut.intoutuotni.com/uploads/1/3/1/4/131437508/7322851.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14490041284.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/the_enormous_turnip_activities.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/38592065673.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/mechanical_engineer_cover_letters.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/56409203187.pdf
    • https://cdn.shopify.com/s/files/1/0449/3859/2424/files/seeds_of_yesterday_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/3676/9447/files/javascript_binary_tree.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5292/files/morphology_of_plants_and_fungi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/calcium_deficiency_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0433/7660/7390/files/toyota_yaris_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/dadodakiluga.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/targeted_selection_interview.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/32404713410.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_off00005ef5.bin
91dc884b618c10cfce525ed60ba0cf884acbece87a34b2c44d3b4f03ec65be4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF5 5488 bytes
font_01_sfnt_off00007164.bin
b478f3910ecdc9d1c93e2bc10bc2356a5c57421cb13eb5006a6419f7a0af0ec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7164 11116 bytes

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