Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ed8c9d4a765b2a…

MALICIOUS

PDF

45.1 KB Created: 2020-08-17 17:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d5090b212b52988971f5e026210b571 SHA-1: e719293b0b69c6a488eb70e735c42e753e5c7096 SHA-256: a3ed8c9d4a765b2a36ece074d948ad11912d00419be3b62ca7356f9e199b0e31
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting it is a lure for 'Biotechnology test questions and answers'. The PDF also contains a large number of external links, as flagged by PDF_SEO_LINK_FARM, many of which point to benign Shopify domains but one points to a malicious redirector.

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=biotechnology+test+questions+and+answers
    • http://mamanin.mwhsolutions.org/uploads/1/3/0/7/130776760/benasaki_monujaganasif.pdf
    • http://nelud.elorafaye.com/uploads/1/3/2/7/132710621/vavufolesuruj_riduzuzisire_jabuvirupepe_mupuja.pdf
    • http://fiponexi.cnpwomensresourcecentre.ca/uploads/1/3/2/6/132682878/9901249.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/pofewimunopedubamoron.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/kivulifizasaminexazopep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/37944349281.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/fallout_3_the_ordinal_43.pdf
    • https://cdn.shopify.com/s/files/1/0437/7057/7058/files/51872300389.pdf
    • https://cdn.shopify.com/s/files/1/0432/0536/1821/files/40792207349.pdf
    • https://cdn.shopify.com/s/files/1/0437/5894/4405/files/49006675699.pdf
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/38217559364.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/52692013736.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006302.bin
f39620f6ffe797c033cd33819dd0625bafe7e46bcad39fa8290c38ee2c07bf1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 5452 bytes
font_01_sfnt_off0000758a.bin
0af56829eb542a93211f4b4b355a2cc341c3ac4d5ce668e3865c1c16d7cb54e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758A 10652 bytes
font_02_sfnt_off000099ce.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99CE 4324 bytes

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