Malicious PDF — malware analysis report

Static analysis result for SHA-256 2780486d72da83d0…

MALICIOUS

PDF

38.9 KB Created: 2020-08-24 04:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 42349f0395720c51b934499e93f3ecd6 SHA-1: 0e52a807024e0d3a9ff04de52f802e5d690daf32 SHA-256: 2780486d72da83d0a973878d15ee1ddf678868fe30bcef2b8f94bd2cb4b23aff
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=soda+platform+shoes+90s In PDF document text
    • http://sewul.mhsdesigns.net/uploads/1/3/0/7/130775350/xatulenofi.pdfIn PDF document text
    • http://files.landfallcert.com/uploads/1/3/1/3/131379111/6170381.pdfIn PDF document text
    • http://files.laniereducationfoundation.org/uploads/1/3/0/8/130813420/tededotezaluvometo.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/1/0432/0916/2907/files/66427125199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/40338363983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/26648382776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1149/6343/files/community_acquired_pneumonia_guidelines_2016_philippines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2405/1358/files/descargar_whatsapp_plus_uptodown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/wixufonejegipunajef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/mibox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/25056988529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/69828181736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/bethel_music_it_is_well.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/tovasuxuzodagorum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/2010954847.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_off000058d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D3 5680 bytes
SHA-256: dab6ec0af59d9e2237861f9ab96e440d99e5cec42632fb323c9fe60dc03625fb
font_01_sfnt_off00006bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 10292 bytes
SHA-256: de2bfa1de58f5a8408d537d4ec17117fdb18242a4a7b004fdec9d5661869b61c

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