Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e922e0600cf7278…

MALICIOUS

PDF

35.2 KB Created: 2020-08-10 16:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b31331a0e54a2869d0c16f73404fc8 SHA-1: 52a79bd6a407a7449226f80c012d9a6ccab80b56 SHA-256: 9e922e0600cf72788eba6dda2f0f0ce2e3255efe0cc4478ba27a493ef7610434
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains and other file-hosting services, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, suggesting a potential redirection to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link manipulation.

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=basic+geometrical+construction+pdf
    • http://files.custom-installation-2020-vision.com/uploads/1/3/2/6/132681062/5520068.pdf
    • http://files.calgaryburnsclub.com/uploads/1/3/0/8/130874085/ziripixizikotuzaxuj.pdf
    • http://files.nexlevelthinking.com/uploads/1/3/1/0/131071082/fa23ef5a5c0d19.pdf
    • http://nomepid.heliamusiccollective.com/uploads/1/3/2/8/132814930/bamozokudur-kaxiragufiwasa-kukarowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/proponents_of_rational_choice_theory.pdf
    • https://cdn.shopify.com/s/files/1/0439/7599/9646/files/treacher_collins_syndrome_julianna.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/makanojunijotajogaxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/tokuvepirofubolowiru.pdf
    • https://cdn.shopify.com/s/files/1/0440/8868/8790/files/all_c_functions.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/71627759096.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/jquery_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/5466/9729/files/32086860226.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/baghban_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/52080455819.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/python_ping_sweep.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_off00004bcb.bin
97c16c9fe0c6e433566d2517991e3fc68fb9623e27453e7a1177f922cd5f710a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCB 5524 bytes
font_01_sfnt_off00005e79.bin
48bf8d4534ddf763623e67d0ed4073aa0111bc44fc00dd33a297f93d3353b8b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E79 9756 bytes

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