Malicious PDF — malware analysis report

Static analysis result for SHA-256 7608767050abec7d…

MALICIOUS

PDF

49.6 KB Created: 2020-08-27 13:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d42607a129845ba0d0b01a7034dfa6b SHA-1: 62ca60ed6dce17cecfb4b4805efff07784f15056 SHA-256: 7608767050abec7dfd1589ad3fc673d953ca09ab32b4d886c1ff2f79a85de598
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though partially corrupted, contains text related to 'Introducción a los sistemas de bases' and the malicious URL, suggesting a lure to disguise malicious intent. The presence of a PDF malicious redirector link and a PDF link farm heuristic indicates a phishing or SEO poisoning attack pattern. No scripts were extracted from this sample.

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/pify?keyword=introducci%25C3%25B3n+a+los+sistemas+de+bases
    • http://xogaxas.laurelpta.org/uploads/1/3/0/7/130739811/sugosek_tojezilovemuri_rajomabiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/xuzipeno.pdf
    • https://cdn.shopify.com/s/files/1/0440/3265/5525/files/vegotelufa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/79256113802.pdf
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/7430348726.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/computer_oriented_numerical_and_statistical_methods_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/english_language_teacher_development.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2678/files/two_digit_subtraction_with_regrouping_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0439/9782/3134/files/poxawugukolobuvixikagili.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8886/files/arya_naa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/best_colombia_travel_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0463/9408/1435/files/webaverob.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2045/files/assistant_engineer_electrical_books.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/vuxetewunegiwejedomadusow.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/33977432465.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/cyber_crime_reporting_hyderabad.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_off000080c5.bin
057bfba157974c4c63a3be751edef13831b6e142665ca7baab52790d10619a7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C5 5296 bytes
font_01_sfnt_off0000926d.bin
8ae9cf219db04b1bbaa883bc0f55e8b9a97312c78456cfd6929f3558fea1eb19
pdf-font-stream PDF embedded font (sfnt) at offset 0x926D 11288 bytes