Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfa5a29a50debed…

MALICIOUS

PDF

39.0 KB Created: 2020-08-15 22:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 596276629bd25cb2cc0cc49367ae89c3 SHA-1: 72d173b7aa1448cdc365fcd162a319196f5ff7cd SHA-256: ecfa5a29a50debed2eeef37fc7e6daeb50a32320c2cd1ccebe7e020e33bbf954
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link redirects to known malicious infrastructure at ttraff.ru. This suggests a link farm or SEO poisoning technique used to disguise malicious redirects. The document body contains garbled text but includes the target URL, indicating an attempt to lure users into clicking the malicious link under the guise of a book download.

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=kaivalya%20darshanam%20book%20pdf
    • http://files.vermillioncpl.info/uploads/1/3/1/3/131380992/jomeroz-nixeborixagud.pdf
    • http://files.katbundy.com/uploads/1/3/1/0/131070452/d93910d.pdf
    • http://files.highbanks.com/uploads/1/3/1/3/131380146/mizuwavobaliv.pdf
    • http://files.summitflash.com/uploads/1/3/1/3/131380107/pabobilebu_mixajakazewil_guvuvanemojok.pdf
    • http://gepifuguz.kgboutiquedesigns.com/uploads/1/3/0/8/130873791/zevagidefexu-bibufaf-gipinexu.pdf
    • https://cdn.shopify.com/s/files/1/0444/2708/3943/files/ben_hur_movie_tamil_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4330/files/pizin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3144/files/tadugesinumimu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/aziz_ansari_modern_romance_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/lasizomemone.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/17132895393.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/95392842764.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0829/files/66172156665.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/pisutapugum.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/agriculture_biologique_en_tunisie.pdf
    • https://cdn.shopify.com/s/files/1/0427/9592/5671/files/11157830485.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/runizos.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_off00005990.bin
b03b446842fd555c464eb2b9e03566a6f676c3a5d9641ea10d71e45250cf4da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5990 5616 bytes
font_01_sfnt_off00006c78.bin
a29417d614718fd82873c651e6be98a3b735056b140ef320c4a1f60b74877525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 10120 bytes

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