Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ca08a1690b713e…

MALICIOUS

PDF

63.3 KB Created: 2020-08-14 07:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8edd377ec4a54835bf3262089ae6b76b SHA-1: e8c0bdfde990a058d0af099a05cbd4ccee77e899 SHA-256: 12ca08a1690b713ed4ad71aadec72439d603741b8e5e7ab5436d05b13de8d2f7
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a critical redirector link to `https://ttraff.ru/pify?keyword=hypermobility+syndrome+guidelines`, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting an attempt to drive traffic to malicious or deceptive content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=hypermobility+syndrome+guidelines
    • http://files.richardmiraan.com/uploads/1/3/1/6/131606291/dujobinava-dazewe-zozerixasuk.pdf
    • http://danaleti.arborcasket.com/uploads/1/3/1/4/131438137/nufalu.pdf
    • http://files.alexandroquerevalu.eu/uploads/1/3/1/4/131407364/fekofuzubusunek-banupedevada-rutezobadipuj.pdf
    • http://files.jvjewelers.com/uploads/1/3/0/7/130740026/5200e3cc6.pdf
    • http://pakaxuwa.seanaffordfineartstudio.co.uk/uploads/1/3/2/7/132712050/lijikasinivizolilim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/91955371457.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/53084966430.pdf
    • https://cdn.shopify.com/s/files/1/0429/4334/8892/files/posejuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/85788306281.pdf
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/71837089622.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1621/files/bapivejuvofel.pdf
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/mufagerokijipofug.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/nizolajun.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/56778994585.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/53784918715.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/65798275060.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b93d.bin
1b1eb4c7bf1998d9c255392e6e58e906d5b691f8313a0199a17cb66418a4150f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB93D 5272 bytes
font_01_sfnt_off0000cb11.bin
32b156d740f7fc56bf23fbd7ae340a853037894d6ef3f4ea8929f1b97d3dfa7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB11 11176 bytes

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