Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e07a8470ad71e6e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-10 07:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6f1bccfde1672bdeeb3668a32c5fbf5 SHA-1: f348fd47402bacd77961285b07e8408b9fedcb02 SHA-256: 2e07a8470ad71e6e4f9693a28fa45ce634562a3ee0ed33f5fba6ca97ba0082a1
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external resources, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=medicina+antroposofica+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, suggesting a coordinated effort to drive traffic to potentially malicious sites. The ML classifier strongly supports the malicious verdict.

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=medicina+antroposofica+pdf
    • http://mezopa.holytrinityparishnh.org/uploads/1/3/0/7/130776499/be16f.pdf
    • http://files.toymigos.com/uploads/1/3/1/8/131856381/61b8c1a.pdf
    • http://files.thelivingrosaryri.com/uploads/1/3/0/7/130775744/dajarapolewawuporuxa.pdf
    • http://files.mpdirty100.com/uploads/1/3/1/4/131406659/lamomaduvoko_pidolabe_pusulivafal_rumovevofumas.pdf
    • http://files.superjumppartyzone.com/uploads/1/3/0/8/130814877/tiboli_dumafugezalebam_gekosibajaxo_xejoxizofukozav.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/36422620227.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/33084921260.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/86944556673.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/rimezejipuvexakiri.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/college_physics_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/botewuzelixuwisunodel.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/73619936195.pdf
    • https://cdn.shopify.com/s/files/1/0436/4563/2665/files/fanafamesimiwuzikuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/47335062673.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/cch_chuyn_t_sang_nh.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.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_off000074e4.bin
83bf5344644ef7f545ab2c3581a8b087de026bf5e760c15f105d93a9e790152c
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 5120 bytes
font_01_sfnt_off00008668.bin
b75812d127dc7b459feadf2867a52066518e500d41ceb04484f5585ba33a798b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8668 11356 bytes