Malicious PDF — malware analysis report

Static analysis result for SHA-256 5711754137b8c879…

MALICIOUS

PDF

45.6 KB Created: 2020-08-14 17:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cfe08f67e800aa611b31978e8224446 SHA-1: fa2322a8e647efd8120844afc8528578c6070201 SHA-256: 5711754137b8c879a1c5f3b30674d2152e62e17c5fdbd407eaa317fff0f41615
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The embedded link directs to 'ttraff.ru', a known malicious redirector, which is likely intended to lead the user to a malicious payload or phishing page. The document body, though heavily obfuscated, contains text related to a 'resume guide', suggesting a lure to trick users into clicking the malicious link.

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=cheeky+scientist+resume+guide
    • http://files.dfinitepartners.com/uploads/1/3/1/6/131607163/018cf4d3661a8e2.pdf
    • http://files.saverenodumpsterdiving.com/uploads/1/3/2/6/132683224/94ec00d19c33716.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/pegolusal.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/68919079552.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/vivifoposefebenediwiz.pdf
    • https://cdn.shopify.com/s/files/1/0446/7798/8505/files/khadya_suraksha_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/zugurojodibetosupezojafe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/90427228464.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1566/files/34150791190.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/management_schermerhorn_13th_edition.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_off00007521.bin
cf55869f31e40dcd0d630c9589dcbdd76ee2733e3ae34ec6f1eb202bbe0cf53d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7521 5184 bytes
font_01_sfnt_off00008698.bin
1aee3cfc19c274fc98bd2ce87daa70b853e2ac9f4aaf15904111a5f0808982a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8698 10280 bytes

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