Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1e81f04a8f4b63…

MALICIOUS

PDF

43.1 KB Created: 2020-08-15 12:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc8c36c08dc6197bc8cf7753ef8369a2 SHA-1: feaad187d3a9554fa8e0a21d4dce63653a3b4aba SHA-256: 8f1e81f04a8f4b636aff79ecd9bcb99a2631c648ae78aeef24312058ba02197f
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=soccer+hero+apk+2018'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

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=soccer+hero+apk+2018
    • http://files.englishestateservices.com/uploads/1/3/1/3/131398244/xipamadulowukemuv.pdf
    • http://files.ausportsweakly.com/uploads/1/3/1/3/131398076/sodedef-ketiz-posodovuxafikuv-zebumuko.pdf
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/ratefukuzofo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/software_design_document_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/windows_movie_maker_2020_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/graphing_inequalities_on_a_number_line_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/44150518916.pdf
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/ksiki_po_angielsku_dla_dzieci_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/4364/9698/files/teks_sholawat_burdah.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/11701835433.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/user_story_mapping.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_off0000694a.bin
c085b4841c4105e2361c1061a41f34b60e42f0c7775fff3ecfb61854629dab85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694A 5500 bytes
font_01_sfnt_off00007bea.bin
232fe61be2e50430b74bae6f6bbe592e15b363e00f862b4fc99d4ddc6a7f99e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEA 10768 bytes

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