Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f1dee484e6d2d1…

MALICIOUS

PDF

64.5 KB Created: 2020-08-11 00:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5409054d2e4e0a1dd01f5b778d04ab1 SHA-1: cf8a62a553c2ceb5a76623b2f829fbc5c6b3f2b7 SHA-256: 21f1dee484e6d2d104f7410296b60f0a36288bb9612820b651a1f85c75e83182
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'Cadbury products list pdf'. This indicates a phishing or scam attempt. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm for SEO manipulation or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=cadbury+products+list+pdf
    • http://files.rathfrilandmotorclub.co.uk/uploads/1/3/2/3/132302913/zomawuzivoludi_petusol_mufawukemur_xitedelufukojob.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • http://fatux.gavaresse.fr/uploads/1/3/0/9/130969465/aab0f2736e00a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/18407647456.pdf
    • https://cdn.shopify.com/s/files/1/0433/7749/2118/files/self_evaluation_sample.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/49658213198.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/87620001686.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/21825814103.pdf
    • https://cdn.shopify.com/s/files/1/0433/6546/6270/files/jquery_zip_code_validation.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/panasonic_ne_1054f.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9968/files/silverstrand_surf_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/8339/7275/files/52171108749.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/xitezazitatote.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/62348272528.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/47725678086.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/personality_disorder_symptoms.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4535/files/biblia_reina_valera_actualizada_2020.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_off0000b0ec.bin
938a87f04229fd126f079d0deb0e7b0447bd46e626aa7e2be03d1b24eaa6503a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EC 5296 bytes
font_01_sfnt_off0000c302.bin
708914addd077a5417f058e718863f1fff42ba0c29e4d02d5d48aca8e5d1aa49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC302 16204 bytes

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