Malicious PDF — malware analysis report

Static analysis result for SHA-256 367aebcc0006c388…

MALICIOUS

PDF

38.9 KB Created: 2020-08-20 14:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 930f6ea4ce26a5a49e8f5dd98e89f894 SHA-1: b7c0064e9fc485c3a0feeaea07d6dfb1d59e1d4a SHA-256: 367aebcc0006c3886e3fff633fc1656fd1975f1773b8af999e5836aa460c8c93
162 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.ru/pify?keyword=gradle++dependencies+command In PDF document text
    • http://files.erictigley.com/uploads/1/3/1/4/131409264/0e52cf8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/rifufodefogejil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/70925401136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5650/3704/files/kexesovumameluwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/93900252014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/69534507548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/word_to_powerpoint_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/rapumixogigulimezuwufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5301/3409/files/pusotol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/jiwakedibumafebijeru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/nemewanibured.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/63925585677.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B38 5252 bytes
SHA-256: e6a2d678e79413827a87a841acb5110922b2a38f4056daac863a060b7a738032
font_01_sfnt_off00006cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 10000 bytes
SHA-256: 4c5a80a4ba2ef382dc02f9a42d03851a70f63355398fe0f8ade05b795bef6d4c

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