Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4cdcd6cf1e3b9d…

MALICIOUS

PDF

37.9 KB Created: 2020-08-05 06:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d80f9a137745c8f3f8c04ce677537e6 SHA-1: 39d0a2f8fe8dfc4a4a239a4d5dcb6e5441f04aa4 SHA-256: ae4cdcd6cf1e3b9dfc00b480a49e69fafe02ad4253b0316a3f44ccbdc409ba4f
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'vb. net tutorial pdf download' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. The primary malicious URL is https://ttraff.cc/pify?keyword=vb.+net+tutorial+pdf+download, which is likely used to redirect users to a malicious site.

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.cc/pify?keyword=vb.+net+tutorial+pdf+download
    • http://files.starcraftfishingboats.ca/uploads/1/3/2/6/132681207/1034703.pdf
    • http://files.overcott.com/uploads/1/3/2/6/132695519/4181826.pdf
    • http://files.marksoutdoors.com/uploads/1/3/1/8/131857041/xunomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/revobaxezofazur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/tupifamewanomawiramot.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/rafegok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevimija.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/91694150933.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/liwolovodukurakodidazodo.pdf
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/convert_to_dxf_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/68805861207.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/rugimaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/misekakeme.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/jozoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/nizapolenafunaxugor.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/58996422814.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/xetetomepuruwuzab.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_off00005837.bin
8c277226c7ca487612a28b9627f724733e1ed9937fb98341b4ec693e0e39743e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5837 5084 bytes
font_01_sfnt_off000069a6.bin
290049e83ce2bc5f852eb8249a33ea2b4430c8686364f074092c058289be6755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A6 9704 bytes

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