Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2fb74f575ae1e04…

MALICIOUS

PDF

76.6 KB Created: 2020-08-10 09:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1687a2e5606553b6a8714b9020b03610 SHA-1: 3e7e59b9e6e66b105c77fe3ff5659abc4db16cc8 SHA-256: b2fb74f575ae1e045562c4a94f91336ff731604043f21a37abd67d125f3f42ff
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=agamben+books+pdf'. Another critical heuristic identified a PDF link farm, with the primary link leading to 'https://cdn.shopify.com/s/files/1/0431/2875/0241/files/fukexolu.pdf'. The document body, though heavily obfuscated, contains the lure text 'Agamben books pdf' and the malicious URL, indicating a phishing attempt.

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.ru/pify?keyword=agamben+books+pdf
    • http://files.jmoymi.com/uploads/1/3/2/7/132712207/pugiludivi.pdf
    • http://files.papolicepsych.com/uploads/1/3/1/6/131636946/xisepibu.pdf
    • http://lusafova.jessicamaytaylor.co.uk/uploads/1/3/2/6/132695569/b66890a8f027da.pdf
    • http://jalureg.pmcpaintingscom.com/uploads/1/3/1/4/131453674/muweniwezuxafo.pdf
    • http://lusafova.jessicamaytaylor.co.uk/uploads/1/3/2/6/132695569/b66
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/fukexolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/pakuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/gofefuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/sibawobaxipovifupasos.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/little_alchemy_flour.pdf
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/mapudanapoxoxuzupixuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/21903609204.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/delutuwovesumewaminaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/deniniwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/mebiji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/95172459024.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/63758157240.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_off0000e726.bin
2612dbc382716c53355e8225058e8a5b53f7aa7db004f250872033125d8b1f20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE726 5424 bytes
font_01_sfnt_off0000f98c.bin
b287fe452f2eb72b58d448ab77db2a0779ac592f69791fc1635bbc9d1353707b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 13348 bytes

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