Malicious PDF — malware analysis report

Static analysis result for SHA-256 50636dcfd21ad818…

MALICIOUS

PDF

58.4 KB Created: 2020-08-13 19:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6978bd9e442c442c0b6356eb326daa82 SHA-1: 586933f9d3a83b608fc58ed7d4db98b8132d0724 SHA-256: 50636dcfd21ad8189f712a11d40241ecea0821498628acd216d703c778c42bc7
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to host SEO-optimized PDF documents. One of the primary links redirects to a known malicious domain, ttraff.com, which is likely used for further redirection or to serve malicious content. The document body, though heavily obfuscated, contains the URL that triggers the heuristic.

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.com/wb?keyword=kevyn%20aucoin%20books%20pdf
    • http://files.workshopforwriters.com/uploads/1/3/1/0/131070374/4103758.pdf
    • http://gadazida.chantillyvolleyballclub.com/uploads/1/3/1/4/131406515/fukako.pdf
    • http://files.eunkangkoh.net/uploads/1/3/1/4/131453592/876373.pdf
    • http://files.zivadancer.com/uploads/1/3/0/8/130814393/8d8b5051bd8455.pdf
    • http://files.redriverworkingdogs.com/uploads/1/3/0/7/130739443/4592729.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/lisaluwuvinodubupapetekek.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/centrifugal_force_and_centripetal_force.pdf
    • https://cdn.shopify.com/s/files/1/0437/6274/5501/files/7621862049.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/5th_grade_end_of_year_math_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/gilapari.pdf
    • https://cdn.shopify.com/s/files/1/0429/2299/9964/files/askep_anemia_defisiensi_besi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/kefavo.pdf
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/importance_of_sociological_imagination.pdf
    • https://cdn.shopify.com/s/files/1/0447/1911/2345/files/animal_welfare_act_1999.pdf
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/ways_of_seeing_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90675932679.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/kalikasan_ng_akademikong_pagsulat.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_off00009fa9.bin
9c515a2bbba9ffe042870d1435c4c70c457f038065b90213f0b467aea3747978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA9 5356 bytes
font_01_sfnt_off0000b1fc.bin
086c7c5e7c9ed978af2e257cc5b5315f433fc1580128af8e05f7cfc9b8f920b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FC 12224 bytes

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