Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccf98a0bbae6483…

MALICIOUS

PDF

42.0 KB Created: 2020-08-26 12:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8b8878651d2a1c20a25ee209b64da61 SHA-1: e72c178b2baf4a4d8f7d09a377fc8ac87e0b93d9 SHA-256: 2ccf98a0bbae64830cb044347bbdd84319886c7e0933fb3853ee4fed2153d931
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on Shopify. The presence of a link farm and a malicious redirector strongly suggests a phishing or malware distribution attempt.

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.com/pify?keyword=boc+study+guide+pdf
    • http://tuzud.townhall2020.us/uploads/1/3/2/6/132681394/4623129.pdf
    • https://cdn.shopify.com/s/files/1/0436/9616/0923/files/joxikaluj.pdf
    • https://cdn.shopify.com/s/files/1/0457/3285/5974/files/panacea_biotec_annual_report_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1293/files/vejigebamabewekisuvol.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/lip_sync_battle_rules_and_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/52480634913.pdf
    • https://cdn.shopify.com/s/files/1/0434/8297/2326/files/86862577773.pdf
    • https://cdn.shopify.com/s/files/1/0431/7940/9568/files/condensation_polymerization.pdf
    • https://cdn.shopify.com/s/files/1/0463/3267/4203/files/euclidean_distance_transform_imagej.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9288/files/wufavivupimiro.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_off00006559.bin
463c205787925e3eed22407cf976e703243876e36fc6681a88be5477f9eca414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6559 5136 bytes
font_01_sfnt_off000076f8.bin
63d95f95277f463b4e6de3f5c2887861be8acf630c566af8183117f343c928ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F8 10860 bytes

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