Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f33e3134410d74…

MALICIOUS

PDF

44.7 KB Created: 2020-08-20 13:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e9fc0d5b20cb78e468d1b874e1e67ef SHA-1: 7de850647bc50358f41d2ac8dbd0d30bb1d8f66d SHA-256: 21f33e3134410d747d60130b610aa78b198836ee5155d510901d20f86eed0b92
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to a malicious site disguised as academic content. The primary attack vector appears to be a phishing attempt leveraging a link farm 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=case+reports+in+pediatrics+hindawi+publishing
    • http://files.blessedbemidwifery.com/uploads/1/3/1/3/131381374/9373480.pdf
    • http://dagipe.rodtannerlaw.com/uploads/1/3/0/7/130775934/f42cc65.pdf
    • http://babekex.tommybarrettbroadcasting.com/uploads/1/3/1/4/131454012/2133414.pdf
    • https://cdn.shopify.com/s/files/1/0434/1268/4967/files/tamil_gun_adanga_maru_movie.pdf
    • https://cdn.shopify.com/s/files/1/0438/2110/5309/files/2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/80139353579.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/62962394259.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/koxivufufisosixejefa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/badmaash_company_movie_mkvmoviesking.pdf
    • https://cdn.shopify.com/s/files/1/0438/9113/0536/files/vitamin_b12_davis.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/gejabunumamoxarelozaze.pdf
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/unir_varios_en_uno_foxit.pdf
    • https://cdn.shopify.com/s/files/1/0441/1083/9960/files/upsc_book_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/horn_antenna_advantages_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0434/1841/9349/files/36848004523.pdf
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/42915707714.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_off000071a2.bin
e9ed28a336b896eeeee068909c915451dcb9293b65ab367a2d00e345da303a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A2 5472 bytes
font_01_sfnt_off00008438.bin
18da7faa9eef1c8076cbeec42eb2bca39aa57a204e7a5ddf8d4a101084128bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8438 9908 bytes

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