Malicious PDF — malware analysis report

Static analysis result for SHA-256 968e70465e20cc37…

MALICIOUS

PDF

54.3 KB Created: 2020-08-03 19:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 106022084239993aa982cab04ee2e203 SHA-1: ccd131e31fccbd942172499c29e7a9dbc4516eef SHA-256: 968e70465e20cc371d48bfd379332242d6d976ee88cf4ed1aeb963f6c270ac90
152 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=hypertension+guidelines+2020+pdf+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2`. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier also flagged this PDF with high confidence.

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=hypertension+guidelines+2020+pdf+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2
    • http://files.johnsonhoopbuildings.com/uploads/1/3/0/8/130814205/9245474.pdf
    • http://files.northoftime.com/uploads/1/3/1/4/131453902/154353dd.pdf
    • http://files.theblossomtree.org/uploads/1/3/0/8/130813489/jofime.pdf
    • http://files.louiseexplores.co.uk/uploads/1/3/0/8/130814189/bonutila-bumobavadobu-tinokeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/32734659077.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/gimuzeximedofo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/minecraft_gta_server.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/temosidanutezeda.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/41929019080.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/15419960064.pdf
    • https://cdn.shopify.com/s/files/1/0432/3508/2402/files/30378633510.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/85390329796.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/23627009661.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4412/files/82530232352.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/gogewo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef2.bin
6009349ae085b5389dc009afd473347a5e24fad435b65694212073616c1aa98b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF2 5336 bytes
font_01_sfnt_off00008133.bin
b882c44c4179b1494a3ffea3713f3e10acaee1f866a4fcf474685b622714bba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8133 6228 bytes
font_02_sfnt_off0000915d.bin
78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x915D 2092 bytes
font_03_sfnt_off00009b02.bin
aa29cade570322f24004977090986a23d1b854670d3c697f4d33950c2b8271a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B02 14928 bytes

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