Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6cd437239b979bb…

MALICIOUS

PDF

66.0 KB Created: 2020-08-12 08:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2331496642b67c64abd732079a860f8 SHA-1: 3f94516b331d22c3d0c4eac75b8ef14c6ea40349 SHA-256: a6cd437239b979bbdb556070daa32a50dfe7ec36b341839763f0dbb8c1db40d2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a malicious redirector link that points to a link farm, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the intent is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=business+research+report+sample+pdf
    • http://files.spirituality-conference.org/uploads/1/3/1/4/131409200/2457497.pdf
    • http://sires.kellihansel.com/uploads/1/3/2/6/132695575/1610871.pdf
    • http://nufiguju.greenkeyconcreteforms.com/uploads/1/3/1/4/131453870/peravi.pdf
    • http://files.cartravelsafety.com/uploads/1/3/1/8/131857304/7742881.pdf
    • http://files.sparkcreativity.net/uploads/1/3/0/7/130738568/liriz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7175/0823/files/giguzuvikonufazatepoxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/96279906937.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/watchtower_quest_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/66415237568.pdf
    • https://cdn.shopify.com/s/files/1/0437/8922/2037/files/92712523319.pdf
    • https://cdn.shopify.com/s/files/1/0438/4971/1781/files/855_717_7778.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/que_es_procalcitonina.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdf
    • https://cdn.shopify.com/s/files/1/0434/7143/7984/files/mibatakisujisez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/biggest_loser_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/factores_psicologicos_de_la_obesidad.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/momijo.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_off0000c4fd.bin
3a032846b725f63ce82f3cb48e392f21df427f538a33a35b55e1b61e79660710		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FD 5444 bytes
font_01_sfnt_off0000d748.bin
5ac425c181c10403666911a82d1d62a8033627ccd14cd77a83d42d6f0f93ce28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD748 10404 bytes

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