Malicious PDF — malware analysis report

Static analysis result for SHA-256 200e47055620f18c…

MALICIOUS

PDF

38.5 KB Created: 2020-08-29 19:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d22b4608d335cf42e9437d3fe47f3c2 SHA-1: 674b2a0f1e3e26f1282a117da509846d1c3333fd SHA-256: 200e47055620f18c495dc54c7fa87eeda2a492b290b20bb795d86cd8f5a6752c
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one prominent link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also flagged by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This suggests the document is designed to trick users into visiting the malicious URL under the guise of a rubric. No scripts were extracted from this sample.

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=oral+presentation+rubric+for+spanish
    • https://static.usrfiles.com/ugd/b8c837_b4899b6f54ef4011b82586438c58c599.pdf
    • https://static.usrfiles.com/ugd/b8c837_59ebf0406e384b1493323d529e7fdad0.pdf
    • https://static.usrfiles.com/ugd/b8c837_923bbfc14b07433fbd2d5976e3bd228b.pdf
    • https://static.usrfiles.com/ugd/dd4472_02d568e478344f9a935ae4b219874b14.pdf
    • https://static.usrfiles.com/ugd/33c377_de7ca3a4f6d348879759c2c0bba2aee4.pdf
    • https://static.usrfiles.com/ugd/b8c837_99410437e9664201b91fb4f9d43c29aa.pdf
    • https://static.usrfiles.com/ugd/83b1b3_48448134a54a4e9ea1cc0e0bc19d2469.pdf
    • https://static.usrfiles.com/ugd/b8c837_57d564a4fd134b08b55684e92cca70d1.pdf
    • https://static.usrfiles.com/ugd/3b0c81_5d897e5e38de42349982da06ddcc58f1.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/93260741693.pdf
    • https://cdn.shopify.com/s/files/1/0433/8532/3683/files/79943541471.pdf
    • https://cdn.shopify.com/s/files/1/0437/4007/0042/files/lujatosifegofogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/counting_up_strategy_for_subtraction_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/project_diva_song_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/75818886419.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_off0000510c.bin
5d1a9a926333017e05422bf4c23a2621fbd1290301484f596e21c12066a83e3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x510C 5268 bytes
font_01_sfnt_off000062ea.bin
fdd8fe0149b7f8890cc1b7adce0178081c41fa1a823ac73830a55c3de27111e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 13404 bytes

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