Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd29a80eef75b9a…

MALICIOUS

PDF

41.2 KB Created: 2020-08-06 21:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c77457241dd95283be372f0a08f27057 SHA-1: ed659698b08c423a1205bb11e05c68f8b2922279 SHA-256: cdd29a80eef75b9ad3f831de3c57efa5dd11903a866afd16b2ef2f067c300c59
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a phishing or malicious redirection attempt. The document body, though partially corrupted, contains text related to 'Odisha b. ed merit list 2020 pdf download' and includes the malicious URL, suggesting a lure to download a malicious file. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=odisha+b.+ed+merit+list+2020+pdf+download
    • http://files.frostbites.net/uploads/1/3/0/9/130969984/2725067.pdf
    • http://files.doulaolympia.com/uploads/1/3/1/6/131607683/2202027.pdf
    • http://files.sterlingartsanddesign.com/uploads/1/3/1/3/131381919/2a68e.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/giper.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/80128439971.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7290/files/rujugususawafuduniw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7549/3271/files/64208223278.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/86531052190.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3218030698.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/76287585300.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/nevuzigugutonuwuji.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/2750494660.pdf
    • https://cdn.shopify.com/s/files/1/0439/3467/9208/files/causas_da_cirrose_hepatica.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/centrifugal_blower_theory.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_off00006181.bin
de25fd04116a4bd019c27e4737e1a064a86524cd50bb2e6a3c398426af9ec767
pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 5848 bytes
font_01_sfnt_off00007545.bin
cef2ccb5cc0c92ccbb7a065ff43278f5dd4b29087d4a05ec589908c31e796464
pdf-font-stream PDF embedded font (sfnt) at offset 0x7545 10244 bytes