Malicious PDF — malware analysis report

Static analysis result for SHA-256 a183c006de0c7e85…

MALICIOUS

PDF

42.1 KB Created: 2020-08-16 19:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0594656dc6f8fecf35c46db7c5e5b48e SHA-1: 4471ab8254d0fd7e19f8b00cbb310bcfe47a9f89 SHA-256: a183c006de0c7e85db7230a324f60cf0208c25b388aa9b4f8f1b8bcd8c9a3b05
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.com, which is disguised as a download for 'Eclipse software for windows 10'. The document also features a large number of embedded links, many pointing to Shopify, likely as part of an SEO-based link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=eclipse+software++for+windows+10
    • http://files.poeticclassroom.com/uploads/1/3/2/6/132681617/84f8fba8a15e.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/tamil_family_relationship_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/structure_and_properties_of_carbohydrates.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/analogias_numericas_razonamiento_matematico.pdf
    • https://cdn.shopify.com/s/files/1/0433/6196/0091/files/50846590215.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/rajokuvonuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/4184975783.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kazapuv.pdf
    • https://cdn.shopify.com/s/files/1/0445/8243/7028/files/ashrae_fundamentals_handbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/adda247_puzzle_and_seating_arrangement_book.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_off00006679.bin
053182a0f1da40de4079079833297641d0d6944862c3ecff952c89b5cafd10e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6679 5392 bytes
font_01_sfnt_off000078eb.bin
0f46acd97b1a75dc9abde5150d07d11e0bb343dcf2b776a362c21080d553cf6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EB 10204 bytes

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