Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba6b2ca89a88ed0…

MALICIOUS

PDF

50.9 KB Created: 2020-09-05 10:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f13c61f52ffcb2178fc2120d0964e10 SHA-1: 610803bc70bd3546c777cc126e49369135c09d3a SHA-256: bba6b2ca89a88ed04a189a75fe33acff24e9acf0b17dd5c23b2e51e1e1d318cf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a link disguised as 'Self performance appraisal summary examples' that redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are benign but serve to mask the malicious one. The document body is heavily obfuscated and contains the malicious URL, suggesting a phishing or redirection attempt.

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.me/wix?keyword=self+performance+appraisal+summary+examples
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/gospel_piano_sheet_music_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48177964882.pdf
    • https://cdn.shopify.com/s/files/1/0435/5391/5043/files/android_apps_making_tutorial_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5919/files/gonamupelumur.pdf
    • https://cdn.shopify.com/s/files/1/0456/4264/5671/files/youth_baseball_practice_plans_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/5651/3692/files/haves_and_have_nots_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2969/files/26864566413.pdf
    • https://cdn.shopify.com/s/files/1/0461/4776/4387/files/fuburadovidelokolegim.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8037/files/16981753268.pdf
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/konumag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49181926903.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/zopiwobifefab.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_off000089a8.bin
4ccd5a71a8610f9ea37741a06dfbad091924d7357091125cf9a0caa8edcffbe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A8 5436 bytes
font_01_sfnt_off00009c1a.bin
b8aa07523d144b9e52302b9a9bfc245bb25248620dd9ab3ae16961794569be1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1A 10272 bytes

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