Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa91a85f53bb7cb…

MALICIOUS

PDF

74.9 KB Created: 2020-09-16 19:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3ccca208fdfb1ad44557fc38d2200d SHA-1: 25acd20be1a021f5385edc4141ab143e6ec34561 SHA-256: 8fa91a85f53bb7cbc3844451907c89ac0d4909e5852ce2d694849b0403fa1e8f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=triathlete+training+bible+pdf+download'. This indicates the document is designed to redirect users to external, potentially harmful content. The document body, though heavily obfuscated, contains text related to a 'triathlete training bible pdf download' and the authoring application 'wkhtmltopdf', suggesting a lure for free content to mask malicious redirection.

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.club/wix?keyword=triathlete+training+bible+pdf+download
    • http://files.sarahsiegler.com/uploads/1/3/0/7/130775084/nirevud_pirinilil_daposegexised.pdf
    • http://podomopes.thekingdomiswithin.com/uploads/1/3/0/8/130814729/8063779.pdf
    • http://files.johnlugotrebble.net/uploads/1/3/1/4/131437513/2656d6205cb904c.pdf
    • http://files.blazindancefitness.com/uploads/1/3/1/4/131483083/mavojavos.pdf
    • http://dowukix.uptonvfw.org/uploads/1/3/1/4/131438563/95c433536.pdf
    • https://ca1b20b3-a59f-4a7f-b117-782c55d12975.filesusr.com/ugd/2e16aa_59f13711a728496d80396945a7246092.pdf?index=true
    • https://49f2f6ac-5606-4ce7-bcae-1d9ee3700d20.filesusr.com/ugd/d1c05f_e9699e49b81c455faa513ac83dd62867.pdf?index=true
    • https://c6e7c526-0aa8-4b1d-9402-860c4d6d01c9.filesusr.com/ugd/f80014_c3940f05f42c4100b6f509e8dc770bae.pdf?index=true
    • https://291bd5d1-99b3-4fd0-8cb7-027e7116347c.filesusr.com/ugd/e3ff21_274ac32b1e904138b8c82a6958185f0f.pdf?index=true
    • https://39acf798-3dc3-4f03-a195-99d2bf5ee313.filesusr.com/ugd/665c20_7a447ee994b7495a8d9486138223eb0b.pdf?index=true
    • https://c6799712-adcc-46bf-9c4c-d2f047e74123.filesusr.com/ugd/c57cae_3bb606ec47d0427abde8d210c9850dd6.pdf?index=true
    • https://820a9583-fc53-45fc-8e64-11d4b3261770.filesusr.com/ugd/48bf55_93370d1c997e44c8a082e456eac2f65e.pdf?index=true
    • https://c91f3ca6-1640-4646-ab4e-e31281effbec.filesusr.com/ugd/e56fe2_6f1da735ed6846d9b4c5d790b5f900cf.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/applecare_medical_group_prior_authorization_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/census_data_2011_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/77993316959.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_off0000dc58.bin
08edad4dd165f2f9c44e5a2b6d3187ade4526e473d08ec0e077ff70694689f08
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 5308 bytes
font_01_sfnt_off0000ee68.bin
9f4d9676f1a1f89e8c7c7a10a3658ecbfd3349ceb44c17ba62b2307b338f5240
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE68 15372 bytes