Malicious PDF — malware analysis report

Static analysis result for SHA-256 2360d0a4c5bd66b7…

MALICIOUS

PDF

40.5 KB Created: 2020-08-05 13:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45db1f3b5e88061cde551c56a3e0a670 SHA-1: 72f3e37d0182e5e2283691bfdf3f65f72e2f81f2 SHA-256: 2360d0a4c5bd66b7efce9c200d8cb50cefcf7a61dfd447b3a27a3a12196085f9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a mass of external links, many of which are hosted on Shopify, suggesting a link farm for SEO manipulation. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=reading+comprehension+intermediate+english+pdf'. This suggests the document's primary purpose is to redirect users to malicious sites under the guise of providing reading comprehension materials.

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=reading+comprehension+intermediate+english+pdf
    • http://files.plumbcogroup.com/uploads/1/3/1/3/131398110/ralowa-babelaraburefis.pdf
    • http://files.teresaraineycamper.us/uploads/1/3/1/4/131408103/wuxokix.pdf
    • http://gotojixa.seafieldfarmva.com/uploads/1/3/0/7/130738841/toluperaloki.pdf
    • http://files.sopoochtraining.com/uploads/1/3/2/8/132815961/kawivibugakovuj.pdf
    • http://files.robertnschaeffer.com/uploads/1/3/0/9/130969932/folimerefop-xosil.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/95359005892.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/sovexox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/mapelazidinawubumepajivaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/24536632931.pdf
    • https://cdn.shopify.com/s/files/1/0432/6945/6028/files/20195649070.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/mixotizukexizise.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/street_fighter_flash.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/piranokitonalokikame.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/php_replace_special_characters.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/dafozepokug.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/6583963393.pdf
    • https://cdn.shopify.com/s/files/1/0430/3434/5625/files/fallout_new_vegas_jsawyer_mod.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/23423095181.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/jukipobemekapo.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_off00005e0c.bin
dab7ecb109f9dbf69d8da1ebe83b22bc4a30f9d0a23c9fb72dd2592ccc7ab3a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0C 5576 bytes
font_01_sfnt_off000070e3.bin
1f7edcec02e0048e409ca4feb72314c0568e309321cbe7c8c26d98672798ea3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E3 10604 bytes