Malicious PDF — malware analysis report

Static analysis result for SHA-256 f552a2efd8884e3c…

MALICIOUS

PDF

40.4 KB Created: 2020-08-31 12:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00725bdbd0feea5641d757fe34303071 SHA-1: b6720bb104b22ce0243997bcd13f1f29b7833ae7 SHA-256: f552a2efd8884e3ccbfe347fee8fd202af3812153766d01503875b51fd13549d
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a study guide, which is a common lure for phishing or malware delivery. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a deliberate attempt to drive traffic to potentially harmful sites. The primary malicious IOC is the redirector URL.

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.cc/wix?keyword=psm+certified+scrum+master+study+guide+pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/sotukorajiwiladu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4318/2999/files/15990405391.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/zofixuve.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/jofeku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/53780730953.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/crimes_contra_a_administrao_pblica_questes_de_concurso.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/que_es_el_anarquismo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9818/files/f-formula_marni_download.pdf
    • https://cdn.shopify.com/s/files/1/0445/8446/8644/files/learn_python_for_beginners_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2108/9444/files/hybrid_rocket_propulsion.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/anabolic_running_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0033/files/mac_ps3_controller.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/15856569302.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/ramuxedawaga.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_off00005d7c.bin
dc08007890078e7b0d37b934110d3aa5f3d2d277bdf987b17f0985195d7b8f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7C 5548 bytes
font_01_sfnt_off00007050.bin
fda3efa0f393fc737979d71faf4b0856bd687f7bd0f5c5171955c6b7f138f5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7050 11208 bytes

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