Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7cff62794d1d5dc…

MALICIOUS

PDF

34.6 KB Created: 2020-08-26 08:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 404c3b71a2e0f794d8525e24b6bba100 SHA-1: a57323eaa8143a4a3bbfd84dd0966c86d0412992 SHA-256: a7cff62794d1d5dc0a9014a97bfbf7155bb757641ebcd1a335664923f3f770a3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though partially corrupted, suggests a lure related to a book title, 'Raven biology of plants 8th edition'. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. This indicates a likely attempt to direct users to a malicious site, potentially for phishing or malware delivery.

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=raven+biology+of+plants+8th+edition+by+evert+and+eichhorn
    • http://files.carlosnarvaezphotography.com/uploads/1/3/0/7/130775071/vojaxagataded.pdf
    • http://files.thechinahustle.us/uploads/1/3/2/6/132682230/76a04eb3a6ab.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/vebopaso.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/canadian_passport_renewal_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4415/files/5595378902.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/combine_and_split_files_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/lovitexoxuguk.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/justice_a_reader_sandel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0434/7147/0742/files/policies_procedures_manual_template.pdf
    • https://cdn.shopify.com/s/files/1/0454/3604/3422/files/gabugun.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/shortcut_formula_of_maths_for_competitive_exams.pdf
    • https://cdn.shopify.com/s/files/1/0434/2582/4929/files/pengertian_antroposentris.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/35044570987.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_off00004756.bin
bfa94c36920f95f16f078a0109f4ccb54b38bf25ef26e4c1b5022c6d2f37b736		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4756 5920 bytes
font_01_sfnt_off00005b7c.bin
80b30b34e4b60f5af85dcd758ec04c6563aff459f356641e768ecf2617e2272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7C 9804 bytes

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