Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcf9f0ccb091e64…

MALICIOUS

PDF

48.9 KB Created: 2020-08-12 20:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5620ad9f06778e42817ae7195506d6de SHA-1: ffe7d6ba9bd723bf09c14fc8655f49d62c4fb42f SHA-256: ddcf9f0ccb091e64c6f73d27a9713eed91b040d9f6e8f20f1dfe908a2dc07edd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate a PDF link farm, suggesting the document's primary purpose is to distribute links to external content, potentially malicious. The embedded links are likely used for SEO manipulation or to lead users to malicious sites.

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/wb?keyword=tlc%20test%20procedure%20pdf
    • http://dibaveger.annpopepotter.com/uploads/1/3/1/1/131164250/foviveximaz.pdf
    • http://radab.harvesttruths.com/uploads/1/3/1/4/131407995/kizuzifakume-telexuduf-pujopitisixe.pdf
    • http://files.redbarnrummage.com/uploads/1/3/1/3/131380213/vanaturagepa.pdf
    • http://nugufiw.laraspectornd.com/uploads/1/3/2/6/132681513/duvuw.pdf
    • http://bepogomek.psychologistinomaha.com/uploads/1/3/1/6/131637016/buwuf_fanilaja_galasipuvo_lenigapab.pdf
    • https://cdn.shopify.com/s/files/1/0431/8724/1119/files/8779865270.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/37921722369.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/sojujosesasidixoxunozi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/73872677533.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/sozerobipujejisodevozomi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/how_to_backup_notes_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1112/files/converter_to_jpg_offline_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/11676179196.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/43679128527.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/13855471329.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_off000082b1.bin
64b2a9f393b3355ead7fae75afc52da33adcb5c9ecef1fc10a638380dec61aec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B1 4888 bytes
font_01_sfnt_off0000935d.bin
dd5a0dcc11e664f18e9b6445d4d3a3a4525fde7907e8e4ea071567d4fac0dc1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x935D 10404 bytes

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