Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea75f65665aeb81…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 02:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fd12b605d7118c524b1c3e49972be42 SHA-1: c56beb9cac66a8358c1cb6d345a8f9bb8b66f7e1 SHA-256: 3ea75f65665aeb8166a9cd82144a43db5a7ab4197713800264927a247f982b2f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The document body and embedded links suggest a lure to academic or software-related content, likely to deceive users into clicking on malicious URLs. The primary malicious URL identified is ttraff.com, which is flagged as a redirector.

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=b+arch+thesis+projects+pdf
    • http://files.thecosmicbrain.net/uploads/1/3/1/4/131453022/bejapatilij.pdf
    • http://files.sacpdm9.com/uploads/1/3/1/6/131606368/berujogabod.pdf
    • http://files.djindyproductions.com/uploads/1/3/0/9/130969576/weful.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/cinebench_r15_maxon.pdf
    • https://cdn.shopify.com/s/files/1/0434/4437/1613/files/78139628122.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/65790967126.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/nikolai_ostrovsky_how_the_steel_was_tempered.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/nowoczesny_audyt_wewntrzny_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/ed_sheeran_deluxe_edition_songs.pdf
    • https://cdn.shopify.com/s/files/1/0435/3507/3440/files/82943081974.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_off00006991.bin
9b30fa6a10741237f7f07ee8fab20a6d4b0477645641c741aec752b55246367b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6991 5336 bytes
font_01_sfnt_off00007bb1.bin
606c2097a4e5cba20d719dccb28851ee530dcfbceb9a72123258c425a0daa16e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 10288 bytes

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