Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d966e75bf9ceff0…

MALICIOUS

PDF

72.3 KB Created: 2020-08-19 11:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4228b37fad741cc4d4c2256c44ffcbc SHA-1: bc919ea96dda3b31087989167358f2562a6ba0e0 SHA-256: 4d966e75bf9ceff051aa69024ba36ac722e1cc5a29899518f0d90d6ad84571f5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=ccna+exam+2019+pdf'. This URL is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates 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.com/pify?keyword=ccna+exam+2019+pdf
    • http://files.serviceprograms.org/uploads/1/3/0/7/130776073/6387721.pdf
    • http://files.roddypaine.co.uk/uploads/1/3/0/7/130776607/2877621.pdf
    • http://files.cranageplanthire.co.uk/uploads/1/3/1/3/131398507/0d9ff4989a9953.pdf
    • http://xuwore.uptonwarrencanoeclub.co.uk/uploads/1/3/2/3/132302944/bubevisonokotejetax.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/40667339336.pdf
    • https://cdn.shopify.com/s/files/1/0434/9585/0150/files/pesquisa_bibliogrfica_livro.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/zuxibukikudukol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/68109814530.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/93553151882.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/zakur.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/votamojubedazofegoxot.pdf
    • https://cdn.shopify.com/s/files/1/0449/9665/7320/files/practical_reliability_engineering_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/5149/8142/files/ali_g_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0428/5949/5590/files/vumaxefufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/24712483521.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/gta_vice_city_xbox_one.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/formularz_ceidg_1.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_off0000d9df.bin
a7ed93b1d8930bee0fa846eaea2657132a9f360b21754ec37b8e6fc777048e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 5452 bytes
font_01_sfnt_off0000ec5b.bin
b5a0ba4233d4ae1f74c44f99d947b30214450fffce621e2bd269f7f8382d535c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 12308 bytes

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