Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa364f800305c0b4…

MALICIOUS

PDF

50.6 KB Created: 2020-08-08 19:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93147bf0a704bec4b86296c7344fb1b5 SHA-1: 04b1021c2eb32cb1548eb5541fb9ea122e636658 SHA-256: fa364f800305c0b4d5172a1afe5e5963e92578a0b4db4a11a3067814fe49909d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/pify?keyword=introduction+%25C3%25A0+l+anatomie+humaine+pdf`. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on `cdn.shopify.com`. The document body, though heavily obfuscated, contains references to the same malicious redirector URL and benign-looking PDF file names, suggesting a lure to external malicious content. No scripts were extracted from this sample.

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=introduction+%25C3%25A0+l+anatomie+humaine+pdf
    • http://files.mseastsclass.com/uploads/1/3/1/4/131482881/xebumuludivodot_kemufip.pdf
    • http://files.massagemattersbynancy.com/uploads/1/3/0/7/130739163/7258187.pdf
    • http://files.thefishroomliberty.com/uploads/1/3/2/3/132302921/ribeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1879/files/5640859086.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/diguropazoxununikev.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/point_slope_to_standard_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/xufexubafenip.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/24662449775.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/1082838963.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/architecture_cv_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/decameron_boccaccio.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/duketurajobokatezume.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8172/files/aerodynamics_for_engineering_students_sixth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/bible_book_abbreviations.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_off00008045.bin
707db4c097acfe4bdb6ee4952bb21dfa8a7c4a1d49728aa4bfc84e0db3f25126		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8045 5388 bytes
font_01_sfnt_off000091dd.bin
634ebe6910f149732f5527a3ec85c5f2ba538f80815f9d422c0e0b5f61ba483a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DD 13228 bytes

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