Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1bb7001a6bbe43d…

MALICIOUS

PDF

39.6 KB Created: 2020-08-25 00:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b1646cc140a6084ff4afbc4b7b199b8 SHA-1: ad844ce228eac8b1769c18f6067f8127c52d58a8 SHA-256: c1bb7001a6bbe43db6d1fd23d7d8cdc039718bc777e6ba084b23164485b7c1bf
92 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 highly indicative of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'The sims 2 university guide' and the URL itself, suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for a high-confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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=the+sims+2+university+guide
    • http://files.ahheidinger.com/uploads/1/3/1/4/131452826/xetazulixuzigas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/bulk_images_from_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/mathematical_critical_thinking_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/36725177079.pdf
    • https://cdn.shopify.com/s/files/1/0438/0485/2386/files/voot_app_colors_tv_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/canales_de_comunicacion_electronica.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/1952627555.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/cadences_worksheet.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_off00005ec1.bin
f8970f85e78b58607277b9308640d883c16e1d468b984ec8e2cc8e291ab8f50f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC1 5240 bytes
font_01_sfnt_off00007079.bin
4c2ded349ca8130ec3bde2445cf8fcc16cd770784b14d5f60ff0d5533e3c39e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7079 9944 bytes

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