Malicious PDF — malware analysis report

Static analysis result for SHA-256 5925fae8f96ce8b6…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 01:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a31c5b4c3fd734d9ddb0ab613272068 SHA-1: 6b32d724862df6b5db950d6381e8fb27a42c8e02 SHA-256: 5925fae8f96ce8b69933eec353cc1e975a0301aeb08d318b6ea9e2e1c235615b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though partially corrupted, contains text related to 'adding decimals horizontal worksheet pdf' and a URL that matches the malicious redirector. This suggests the document is designed to trick users into clicking the link, leading them to a malicious site for phishing or malware distribution.

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=adding+decimals+horizontal+worksheet+pdf
    • http://norolo.bodycodehealings.com/uploads/1/3/0/7/130776760/tuvojuta.pdf
    • http://files.georgektan.com/uploads/1/3/1/4/131438324/2921691.pdf
    • http://files.wildwaterssoapery.com/uploads/1/3/1/4/131407089/jolijupozun.pdf
    • http://files.georgektan.com/uploads/1/3/
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/67932694647.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/momiluxivuginorov.pdf
    • https://cdn.shopify.com/s/files/1/0437/9305/5904/files/4722319688.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7351/files/57624879231.pdf
    • https://cdn.shopify.com/s/files/1/0438/2500/4706/files/anexos_de_la_piel.pdf
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/how_to_write_a_rogerian_argument.pdf
    • https://cdn.shopify.com/s/files/1/0445/5153/6799/files/irs_pub_550.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3643/files/aufgaben_additionsverfahren.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7561/files/lutolugazefotakas.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/96728247334.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/garemodaxizebonu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4168/files/kilabakufijejuvibosenos.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/lawaxuxenojolen.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_off00006380.bin
7885dafc7c363eb560054e636eb0fe9daf90203f1381e1d0d976f3d0ed3b85fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 5764 bytes
font_01_sfnt_off00007715.bin
1208d8771222699e278380a9b03ce2d08d5fa0a0d2da63f5fab43e24c9a0ed1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7715 13104 bytes

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