Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0fb7e801b117a9…

MALICIOUS

PDF

47.7 KB Created: 2020-08-09 02:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4f6eaf99fa739704e8f4de7b61f7c39 SHA-1: e818a433eb2fc106494b12e5852622db0ff3de9b SHA-256: bf0fb7e801b117a9cb1392ae020cbdbf9ac6995fa7eeca0b8398f88a3d180d7f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=homeopathic+care+for+cats+and+dogs+pdf'. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=homeopathic+care+for+cats+and+dogs+pdf
    • http://files.nauvoopubliclibrary.com/uploads/1/3/0/8/130874536/1488269.pdf
    • http://files.hartrockets.com/uploads/1/3/0/7/130775679/fukuwir.pdf
    • http://xoduvavoj.djvlabels.com/uploads/1/3/1/4/131406717/4444228.pdf
    • http://files.cindreabrooke.com/uploads/1/3/1/4/131406453/64acd.pdf
    • http://files.mitchellhabitat.org/uploads/1/3/1/4/131454549/kefapivo_finegenar_jinaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/91541495150.pdf
    • https://cdn.shopify.com/s/files/1/0433/7929/4358/files/ramagetazujefe.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/kiwutejisisimazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25006313747.pdf
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/marofego.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/adjectives_words.pdf
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/sample_vehicle_lease_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7294/files/mixufarumuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/alone_together_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/65902283943.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/gugixinamixiduxefami.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/because_he_lives_piano_sheet_music.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_off00007b38.bin
37ffe9297ceb6fe64f3853a7b100b4ab66ba73fa5b99f7dbd290da79321ad61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B38 5500 bytes
font_01_sfnt_off00008dc2.bin
857e96ddf48fc8f91efd0cf36b276d97150ed13b63fa8611f9a36d5ad8febc9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC2 10500 bytes

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