Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f75fedfbe87984e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 19:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63d2c8ab92360a146459bf58d01de655 SHA-1: 9107af8a79d339915bb21ce67a4d8c4b8942c4e5 SHA-256: 7f75fedfbe87984e0cbbbcabbe209863b4202ccd544af8b8751cb0174425b18f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=microsoft+sql+server+2016+developer', which is flagged as malicious. This suggests the document is designed to trick users into clicking the link, likely leading to a phishing page or malware download. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm tactic to obscure the malicious destination.

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=microsoft+sql+server+2016+developer
    • http://files.jacquelynjbenson.com/uploads/1/3/0/7/130739313/gepunejedogonufigu.pdf
    • http://files.danishquapoor.com/uploads/1/3/1/3/131383760/jilurofidimenisiki.pdf
    • http://gesejuzo.delphimalamutes.com/uploads/1/3/2/3/132302780/gasofekusisa-rifebediru.pdf
    • http://files.parttimewanderlust.com/uploads/1/3/0/8/130874257/bfa27f72cb.pdf
    • https://cdn.shopify.com/s/files/1/0435/8379/9459/files/columbia_river_walleye_fishing_report_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/hybridization_of_orbitals.pdf
    • https://cdn.shopify.com/s/files/1/0451/1825/9365/files/stick_figure_games.pdf
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/airfix_model_world_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/95380581673.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/tofapivevukuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0963/files/45187124318.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/41226082523.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/287613023.pdf
    • https://cdn.shopify.com/s/files/1/0462/7084/0981/files/length_conversion_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8708/5222/files/body_systems_and_functions.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_off000060bb.bin
565d5c3e1bc8d40e5af975df9b58d17d88d665c364af289c295f7d5f76f1179d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5608 bytes
font_01_sfnt_off000073ed.bin
771bfea3451d1bbf6582c0f7cb81480d099f243e36066b9c439f41069c53efa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 9928 bytes

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