Malicious PDF — malware analysis report

Static analysis result for SHA-256 7622c9934e3c32e5…

MALICIOUS

PDF

44.7 KB Created: 2020-08-24 15:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e20b5ec53fb7e7954130e6e8065f02e SHA-1: 6d11708b7eeba896629f7b4c1566d2388b025837 SHA-256: 7622c9934e3c32e5c4b3fc8705c4b100fa20ba70e47fdec3c2aa9a43e8030d1f
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=csf+fluid+analysis+pdf, is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to a malicious site. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.com/pify?keyword=csf+fluid+analysis+pdf
    • http://zakopanuz.sailcarrier.com/uploads/1/3/1/4/131454165/berip.pdf
    • http://lewixa.washingtonactivities.com/uploads/1/3/2/3/132302926/sipigewepoxa-gogakumofexoji-visase.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/xabirudiwezajabeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5006/6339/files/2020_telugu_calendar_with_festivals.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/computer_programmer_resume.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/anatomy_of_hell_dual_audio.pdf
    • https://cdn.shopify.com/s/files/1/0427/9900/5863/files/gst_books_for_ca_final.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/xuwerotul.pdf
    • https://cdn.shopify.com/s/files/1/0450/0792/9508/files/functional_programming_in_javascript_luis_atencio.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/95254688492.pdf
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/dijurinom.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_off00006596.bin
d6319b0bf23938ec794d8cb8c4bcdc643334d1fd51ef97c0e604f74a1a8fa232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6596 4948 bytes
font_01_sfnt_off00007688.bin
5f406a98c90e683206e89f3e3df02fd756b02e21a5b0e5c167325c358d62b1ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7688 15404 bytes

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