Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d53fb9e7265862…

MALICIOUS

PDF

42.0 KB Created: 2020-08-01 23:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ce94793ee1d5c8856fb9c9d64c43903a SHA-1: b488dd1313e0bb4b0461a1e7cac14114bf1f0bf3 SHA-256: b9d53fb9e726586291c1088643511093e52f126e2640d47c050c2fd2857d7554
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.ru/pify?keyword=runescape+summoning+calc In PDF document text
    • http://files.chagrinvalleyrestaurantweek.com/uploads/1/3/1/6/131607407/bazegow.pdfIn PDF document text
    • http://files.jimkibler.net/uploads/1/3/2/6/132695258/basik_kexejapati.pdfIn PDF document text
    • http://files.pampangarealestate.com/uploads/1/3/0/7/130775634/tiwegimumuna-vovobowiwago-xijapofabuv-leludekowuzovef.pdfIn PDF document text
    • http://files.burnishclaystudio.com/uploads/1/3/2/7/132712115/gixowatiluz_fiteturu_xemoxunaw_wiguribele.pdfIn PDF document text
    • http://files.aplvirtual.org/uploads/1/3/0/8/130814935/2099665.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/1/0431/8304/6813/files/94290300406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/dutaponosuvoxukot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/94674815950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/womonevixaxijebuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/nakigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8462/7614/files/wubabokisorepitofiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/28987547144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/xabim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/67998160768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/84671126203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0758/2106/files/82060790695.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_off000061d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 5164 bytes
SHA-256: 05ff8ea34f2dc559edd16f21e52516fe6dfedfe5b030fd9136b120f5c8493f41
font_01_sfnt_off00007360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7360 12288 bytes
SHA-256: 84cd228b8ea805104adba4efaa5b22fe557df7e2bf47ccf5ce85eb2c9b94770d

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