Malicious PDF — malware analysis report

Static analysis result for SHA-256 289b6b57be521a4a…

MALICIOUS

PDF

37.9 KB Created: 2020-09-07 19:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8ecfc43775fd3d9d542ebd2ba9fb39f SHA-1: 5709a5a3c313ba97d131e4bc6a573058476b19ad SHA-256: 289b6b57be521a4aca8d0426d73afaeaa1244409ee289bbb5721c4bcd1ecb668
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, disguised as a university guidebook. The document also exhibits characteristics of a link farm, with numerous embedded links pointing to various PDF files hosted on Shopify. The primary malicious intent appears to be redirecting the user to the malicious URL through the deceptive document content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=macleans+canadian+universities+guidebook+2018
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/68439668196.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/40840649086.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/cancer_de_cuello_uterino_y_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/intermediate_value_theorem_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0498/files/emergency_response_guidebook.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/17933145515.pdf
    • https://cdn.shopify.com/s/files/1/0434/8854/2872/files/pofijumam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/surogejuxesamugumebuton.pdf
    • https://cdn.shopify.com/s/files/1/0435/9022/1983/files/bubble_letter_e_template.pdf
    • https://cdn.shopify.com/s/files/1/0464/2550/5944/files/activator_createinstance_form_vb_net.pdf
    • https://static.usrfiles.com/ugd/ac8c68_546c926a129b40eca5ae09ee27df691a.pdf
    • https://static.usrfiles.com/ugd/be19e1_0686293e2ec94ddeb7faaff06793e74d.pdf
    • https://static.usrfiles.com/ugd/696117_2c7cff3acea145b6923614fb05294598.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_off00004e06.bin
37dd2003e9503bc3b0f3ebf46f67a863b417095e382f3cb4e06fddae119becc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E06 5896 bytes
font_01_sfnt_off0000623a.bin
6404565c0a38f014ab4f0c424a6822ed7e2a76d3e9d3bf689b1fe38cdf58c750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 13024 bytes

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