Malicious PDF — malware analysis report

Static analysis result for SHA-256 585f78cb3758a8cb…

MALICIOUS

PDF

58.9 KB Created: 2020-08-14 09:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c38aae4f8ab9baebb690989dbca7dc93 SHA-1: b2abd80832865590f380041b1b672622c8af0de5 SHA-256: 585f78cb3758a8cb5655d8e4b8bc36b899f6575ba19ea6a1c5381440e441d5a6
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm or SEO manipulation, with numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru), indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of external links, including one redirecting to malicious infrastructure, suggests a malicious intent to lure users to harmful sites.

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/wb?keyword=suralimentation%20par%20turbocompresseur+pdf
    • http://files.jonathanpschwartz.com/uploads/1/3/0/7/130775819/muzoredalezeruw-kubikalaxaz.pdf
    • http://files.internationalleatherbear.com/uploads/1/3/1/4/131437669/7300274.pdf
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdf
    • http://files.imandycole.com/uploads/1/3/0/7/130775685/zemekafudimoruri.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/puzazetixanepubuzuxixotam.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/catalogo_avon_13_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/8959/0427/files/personal_income_and_expenditure_template_excel_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/61374282224.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/napididiramunutakelanaz.pdf
    • https://cdn.shopify.com/s/files/1/0441/2545/4488/files/59228748085.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/seismic_waves_activity_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/96008754415.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3816/files/nobulepoxolug.pdf
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/22112850716.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/pitisuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c47.bin
5942c593805f561ba8dc47617a4f49d3ac1fadc608a7b4b35c6b0d814713b55f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C47 5424 bytes
font_01_sfnt_off00009e88.bin
4c603f57e6850fb5cc9393af0ffd859159050ea7ced4ef9c1ea9f052615b4cac
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E88 16184 bytes
font_02_sfnt_off0000ce88.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE88 4324 bytes