Malicious PDF — malware analysis report

Static analysis result for SHA-256 52889a32c81cb7aa…

MALICIOUS

PDF

46.1 KB Created: 2020-08-05 03:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82e7b2ddab53d4ec58edd9c84cc4f73b SHA-1: 2e9dc4b504fb2f35a25b1d4b4e387795f7a775d8 SHA-256: 52889a32c81cb7aa3b083d426393167bf49c0af708cdc97f00cb0e38bddb0a88
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=el+aprendiz+de+brujo+ajedrez+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector. No scripts were extracted from this sample.

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=el+aprendiz+de+brujo+ajedrez+pdf
    • http://files.focusedlearningsolutions.com/uploads/1/3/1/6/131636990/49d8e9.pdf
    • http://files.featherriversc.org/uploads/1/3/1/8/131871854/6001380.pdf
    • http://sawefuw.gotaiwan.cc/uploads/1/3/2/6/132682327/wonawag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30611133668.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56346524494.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/fajegugisokakubepalazuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/21669248160.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/basketball_rules_book_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/animated_mouse_cursors.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/calculus_larson_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/86246845364.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/mejepetitovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/nulumuwewusip.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/wewokefokodipewanedusax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0756/5214/files/life_and_death_in_shanghai_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/99508371229.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_off000072a4.bin
455289dad2a5878f09dd9f91ff6a9096715659fc5b3ee16de8bed1e7ae651092		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A4 5080 bytes
font_01_sfnt_off00008408.bin
be0bb0fcdbca0eae35a83500f7162f25b6060d3e77a890b6d33f11564efbc4e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8408 11576 bytes

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