Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c15cc8d14cca594…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 22:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 33438067e5d175289acebb76f9d6833c SHA-1: 2ea37ac6a02a11c92264a9da773596b4146f0d28 SHA-256: 8c15cc8d14cca594f98be7de2943eee44298fc91b789f52d618aed6c222e88c6
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=arts+council+logos In PDF document text
    • http://files.wisewomangardening.org/uploads/1/3/1/0/131071043/4bf5124b3c86.pdfIn PDF document text
    • http://files.mybooksucks.com/uploads/1/3/1/4/131438641/vakovilekimusikaxen.pdfIn PDF document text
    • http://vufufez.theimagodeiclassicalacademy.org/uploads/1/3/1/0/131070109/7141275.pdfIn PDF document text
    • http://zizezele.weiserschools.org/uploads/1/3/1/6/131606218/pezuwebat-sebereruj-xazafosomuwerav.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/1/0430/8228/5216/files/jelogufawuraza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9748/9561/files/playboy_magazine_price_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/affixes_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3359516262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/59059003112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0005/2387/files/28462242392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/61180449324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/98588048848.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_off00005f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 4744 bytes
SHA-256: 6fc9509ee255b8adac5245884f006812cde3c589fb054577b9db02f287548511
font_01_sfnt_off00006f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 10172 bytes
SHA-256: c0dd5865963263ee802bbec296da02eda119bdf0be3a9bc55814382446039a07

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