Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d779b2f4063168d…

MALICIOUS

PDF

38.8 KB Created: 2020-08-03 12:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04e977ab75e2dc76b25564aba04ba7bc SHA-1: ea62b232ca9a7644283432c7587b713f68173c42 SHA-256: 7d779b2f4063168dcb2b0b9e8525a9873dee1c8535dcb141d8ff5c5facf85b46
150 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 of which point to external websites. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=tanatologia+para+ni%25C3%25B1os+pdf'. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. The presence of numerous links to Shopify-hosted PDFs, some of which are benign, indicates a sophisticated link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=tanatologia+para+ni%25C3%25B1os+pdf
    • http://files.alex-kwon.com/uploads/1/3/0/8/130814588/zuteso_xebesol_laruforutulaf_xilumivaxaxugon.pdf
    • http://files.ninetalesstudios.com.au/uploads/1/3/0/8/130813732/binor_jikubuli.pdf
    • http://zogef.fazzersports.com/uploads/1/3/0/7/130776644/nuvotavogeji_nizemekulul_dalupufo.pdf
    • http://files.layagsug.com/uploads/1/3/1/3/131379928/6757968.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/56095159836.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/24497662735.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/10820830967.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/21905301973.pdf
    • https://cdn.shopify.com/s/files/1/0437/5429/1354/files/nixefumomojanizabim.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2085/files/android_transfer_app.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/malawuguvirinenaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/this_person_does_not_exist.pdf
    • https://cdn.shopify.com/s/files/1/0438/6609/5781/files/bibezirobogagawugedisapig.pdf
    • https://cdn.shopify.com/s/files/1/0436/1388/0483/files/cricut_cartridge_images.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/jigikesonemelovivejugup.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/kisodidokimobesamofim.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_off0000557b.bin
9b58a424650dd44d89f143e06beabc8a31312ab1434315bd0c7efbf83048fc0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x557B 5368 bytes
font_01_sfnt_off0000678d.bin
1144ec08b92f828c9a68da3d60befb7cfd8f48494a1b2715cc9a9f655953331f
pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 11440 bytes