Malicious PDF — malware analysis report

Static analysis result for SHA-256 942f479c08b6efdc…

MALICIOUS

PDF

34.5 KB Created: 2020-08-25 10:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84a055d80ee77ec0ff68c5ac440bcf5d SHA-1: cb089e94a3bb9fc97627b8f93eb3d59e377126bc SHA-256: 942f479c08b6efdc9481a517b5b1ccf4e91ac716a34e7cf2694afef4d707c0d0
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text referencing 'Turnitin plagiarism spectrum pdf' and the malicious URL, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination.

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.ru/pify?keyword=turnitin+plagiarism+spectrum+pdf
    • http://bitude.jpheffernan.com/uploads/1/3/2/7/132740414/xafelow.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/remuneration_committee_terms_of_reference_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0729/files/nebisamabemewose.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8096/files/mubogebipodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/muxeruzuragozo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4665/files/free_online_converter_to_excel_file.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/23946874433.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/pigefumoma.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/zovibewora.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/31810158697.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/24708990664.pdf
    • https://cdn.shopify.com/s/files/1/0437/4432/9877/files/defusarafev.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/trastornos_alimenticios_en_adolescentes.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_off00004ac2.bin
230f3d6af59fd4ba6ea51be13513b79175ca42a5f296168f47595debb88fea05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC2 5424 bytes
font_01_sfnt_off00005d15.bin
213fe849709fb44d543c7e84997e7c85b81d3796ac206e439397ffb0442c89a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D15 9504 bytes

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