Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fed237f126e4fd…

MALICIOUS

PDF

39.0 KB Created: 2020-08-07 05:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05df11424986f183c97847dd2f3dbc58 SHA-1: 38902469dddc80fcb33350dbb150a36a8afabbb1 SHA-256: 98fed237f126e4fd5d5caf28c7afe1c05abfb26b050b42e9c951ec7a2572802a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one to a known malicious redirector at `ttraff.cc`. The document body, though partially corrupted, suggests a lure for a free academic PDF, a common tactic for distributing malware. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent.

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.cc/pify?keyword=abnormal+psychology+an+integrative+approach+8th+edition+free+pdf
    • http://dijema.pierrefinearts.com/uploads/1/3/1/4/131483083/5599105.pdf
    • http://files.rina-bansuri.com/uploads/1/3/1/6/131606923/a73491a281c9.pdf
    • http://voruf.rlcchouston.org/uploads/1/3/1/6/131636725/b9449b.pdf
    • http://wedupufel.marcushedahl.net/uploads/1/3/1/1/131163590/3866220.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/putazoxare.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37629755229.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/41380294769.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/child_depression_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/fuwokekebikof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/sequence_and_series_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1577/files/caterpillar_operation_and_maintenance_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/i_can_t_hear_people_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/91379272517.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/vipojadawegutujokaguluxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/laravel_should_you_test_every_validation_rule.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_off0000567e.bin
f515147b1b182842790a4ef1af0d1964211fdbbf376b24488bc0ae8f06fb9cdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567E 6052 bytes
font_01_sfnt_off00006aef.bin
63c3140852db836e381493a69852880da2d3bc95bf1c7ce99a83938630e75240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEF 10584 bytes

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