Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd9c14c69ebd44a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-11 07:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01d62300853cd468d6bc0ac10b34478c SHA-1: 82d8d7942cabb1e00d223525d778f40ad0dd3555 SHA-256: 4fd9c14c69ebd44a388ac104f95f8398eaa0a23c448f1e785d52bc00a4aba13f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking title, suggesting a lure to disguise the malicious intent. The primary goal appears to be redirecting the user to a malicious site.

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=heilbrunn+timeline+of+art+history+pdf
    • http://files.graysvarsitygreek.com/uploads/1/3/1/0/131071258/d7f3f561ea820ef.pdf
    • http://files.shopvarietyislife.com/uploads/1/3/1/4/131409861/gikeriximebegexetot.pdf
    • http://files.skylightyogafit.com/uploads/1/3/0/7/130775825/1471912.pdf
    • http://files.fcccambridge.org/uploads/1/3/2/7/132740836/612424b.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/68859366255.pdf
    • https://cdn.shopify.com/s/files/1/0434/4414/2245/files/odia_book_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6559/8364/files/nenuge.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/rolovigolageg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/runoruviridemim.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0024/files/38161541590.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/gaforawefofikojajewaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/create_a_list_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/vojosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/55347009907.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_off000069c7.bin
e31aca2951bf2f84678f2df7f89c0d25ebcd98b7edeb45044978526e20389a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 5484 bytes
font_01_sfnt_off00007c36.bin
8de6bbbeb67762dff5d5dc26e3582046524380264823558e2391f7e4a5a19ceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C36 10236 bytes

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