Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba1c8e86bd5a3f8…

MALICIOUS

PDF

45.0 KB Created: 2020-09-18 17:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83a78bde11a8c92062915bb90cc87359 SHA-1: 951607acb8a652b7fa7dbf7874faa2e5ae854ca1 SHA-256: 1ba1c8e86bd5a3f8930cf22985d4188db6609d11c895f03bedd3caea86a0e95c
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the text 'Helen keller worksheets for 3rd grade' and the malicious URL 'https://ttraff.me/wix?keyword=helen+keller+worksheets+for+3rd+grade', suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links further supports the link farm heuristic.

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=helen+keller+worksheets+for+3rd+grade
    • http://fizejema.churchoftheholyspirit.org/uploads/1/3/2/6/132696558/e16e73.pdf
    • http://logul.boostfitness.co.uk/uploads/1/3/0/7/130775309/6537297.pdf
    • http://kunuruku.breedengallery.com/uploads/1/3/2/7/132740829/7213947.pdf
    • http://files.livepurebodycare.com/uploads/1/3/2/6/132681438/gusitefa.pdf
    • https://b08921c9-ee94-4b31-9366-7952f41c29c0.filesusr.com/ugd/a382ee_f8ac7120001e4d0383c124db6248f3fe.pdf?index=true
    • https://fd169d0c-b088-413b-89f5-7d0e9bd35afb.filesusr.com/ugd/3b0c81_58fccc24c99a409595973c62e4fce042.pdf?index=true
    • https://fac2db32-8e98-4cad-bfc6-d8843c82e520.filesusr.com/ugd/c7a620_781ec32b085f4369a927a89f563b0486.pdf?index=true
    • https://1d06ba43-cb9c-4d8a-9011-023fb448ca96.filesusr.com/ugd/dc8a8e_7e87d414225f46a29b45960e1e2bb1db.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/41823203274.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/munukixiwakifuja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tedix.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/equipment_rental_agreement_template_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/glu_credits_hack_apk.pdf
    • https://cdn.shopify.com/s/files/1/0470/8981/1614/files/89584713160.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/60171520214.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000633b.bin
89c7b40cfbd8bcd1287e3eca78d16038dab6fb8bd4a211a3a5fd02e505b3d56e
pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 5192 bytes
font_01_sfnt_off000074e7.bin
dd6fba2e9760fe36b68974296d509bd3d65f6073c394d8ee466696c5d9f877fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E7 10576 bytes
font_02_sfnt_off000098cd.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x98CD 4324 bytes