Malicious PDF — malware analysis report

Static analysis result for SHA-256 24edfb6880ba80c3…

MALICIOUS

PDF

56.0 KB Created: 2020-08-21 01:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91d194c370c085c2b342ea4f547f73fb SHA-1: 512189aac31aba4fdf732bc71cef4f55927c91f8 SHA-256: 24edfb6880ba80c33190e9f544f49563da2953bc2e104c470ad0c5e0fc0595f6
120 Risk Score

Malware Insights

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

The PDF contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The document body and extracted URLs suggest a lure for 'Adobe Acrobat Reader 8 Mac' which redirects to `https://ttraff.com/pify?keyword=adobe+acrobat+reader+8+mac`. The PDF also contains a large number of external links, flagged by PDF_SEO_LINK_FARM, with one pointing to `https://cdn.shopify.com/s/files/1/0434/8998/4674/files/critical_ops_pc_windows_8.pdf`.

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=adobe+acrobat+reader+8+mac
    • http://lototiv.marysteinkedesign.com/uploads/1/3/0/7/130775478/jowonamiregobe.pdf
    • http://files.haydensheroesmd.org/uploads/1/3/1/4/131437295/729698.pdf
    • http://files.drmartinandrew.com/uploads/1/3/0/7/130775592/56f0585f314.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/critical_ops_pc_windows_8.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/arching_effect_of_brick_bonding.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/apartment_lease_agreement_ny.pdf
    • https://cdn.shopify.com/s/files/1/0461/6821/1608/files/apple_audiobook_not_ing.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8611/files/53184274485.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7670/files/industria_alimentaria_tecnologias_emergentes.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/miman.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/similar_shapes_worksheet_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/87696930935.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/94332548044.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/32980026659.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_off00009deb.bin
9dce8d6ad089f9604a878c1a6ed0de83e631c9d46396d04a5b95ebeed6e52582		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEB 5196 bytes
font_01_sfnt_off0000af7f.bin
a276c5587b58139fcaf5619f82273b63887833206edffbd852a657e728583103		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7F 10420 bytes

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