Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fc66fbb6651c37…

MALICIOUS

PDF

44.4 KB Created: 2020-08-11 21:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2df07aca46e06a91715f20dd4944b5de SHA-1: e2086a38714528f2f541736ff95ee2fdd04e3e0a SHA-256: f6fc66fbb6651c37e1e402846009514cac61cb71a463d40be28c0cd21cc1360f
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, many of which point to a link farm hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. One critical heuristic identified a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=cbre+north+america+cap+rate+survey+h2+2020+pdf'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious redirector URL and several other unknown URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cbre+north+america+cap+rate+survey+h2+2020+pdf
    • http://mokute.realty33.com/uploads/1/3/0/7/130775519/luzuwo-xukuzos-lumudufalolimul-fowixidej.pdf
    • http://bupikafep.orlandogibbonsproject.com/uploads/1/3/0/8/130814328/f865b2.pdf
    • http://files.easingwoldartex.org/uploads/1/3/0/8/130874086/4e831.pdf
    • http://files.annique.org/uploads/1/3/1/0/131070109/nudupoxuke_dusuzazipepiv_gidiwekoku.pdf
    • http://files.canadianfirearms-safetyandtactics.com/uploads/1/3/1/3/131383823/cfd30117.pdf
    • https://cdn.shopify.com/s/files/1/0431/2091/8679/files/le_carburateur_automobile.pdf
    • https://cdn.shopify.com/s/files/1/0446/6016/2713/files/milk_adulteration.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/circumference_of_a_circle_word_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2071/4137/files/microeconomics_parkin_12th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/punijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/discord_rp_servers.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0591/files/velabijukigafos.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/munanemu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/44075178727.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/49222853208.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/filetupanitarigotaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/kizalavosopiwul.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d33.bin
d62a53a4f95c2bfdd614db0aa42aafa3522d9ee08523c6a821c82da2213a61de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D33 5844 bytes
font_01_sfnt_off000080f3.bin
1ed3d85ff9ba1fa17c1ba9a50fe56645956ba2df7ae1749512bf20e37003566c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F3 10312 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.