Malicious PDF — malware analysis report

Static analysis result for SHA-256 9790b39d3e9c6e69…

MALICIOUS

PDF

40.1 KB Created: 2020-08-21 04:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 762808bafb70cc4e4910d8db92c41e8f SHA-1: 54db9c58b34076d33943e24dc7140fac22150684 SHA-256: 9790b39d3e9c6e69b9e79f5e1854b213de4e6e7a24a328b50d696dcc15620fda
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=choir+music+sheet+pdf'. This indicates an attempt to lure the user to a malicious site. The document also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the presence of the redirector and link farm strongly suggests a phishing or social engineering attack.

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=choir+music+sheet+pdf
    • http://fimikax.another-bright-idea.com/uploads/1/3/1/4/131452958/dekuseve.pdf
    • http://files.interiorsbydabas.com/uploads/1/3/0/7/130776200/f607c8259.pdf
    • http://jafux.tilburgmun.com/uploads/1/3/1/4/131437535/7b92a2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/50352766627.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/tew_2016_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/circle_geometry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6863/files/dragon_ball_z_android_saga_watch.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/peruzerurim.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/manual_and_automation_testing_courses_in_hyderabad.pdf
    • https://cdn.shopify.com/s/files/1/0437/3233/6792/files/dart_tutorial_for_flutter.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/defifixogatisugizupazudok.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/73079626307.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2004/files/manejo_de_angina_de_pecho.pdf
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/broadening_of_spectral_lines.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_off00005f57.bin
375538afc0458944e1ae5754665da19afc0a562fde5af77963d1f8a04913524d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F57 5056 bytes
font_01_sfnt_off00007068.bin
778dfe2db45d76b12ef1767d6d47206c9a56dc8c2113e43a9f00e136113f3b11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7068 10784 bytes

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