Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53ebdd2bb0bcd67…

MALICIOUS

PDF

43.3 KB Created: 2020-10-19 16:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 564b586021dec187e14896137b461fcc SHA-1: 5dba11e94353f11cd36a2a5f126489888d9b6771 SHA-256: d53ebdd2bb0bcd6783fc072ac8bd58c940768ce56d8525c1b1800ced9fed12d8
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://ggtraff.ru/123?keyword=biosintesis+del+triptofano+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f8d9adb3ffd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f8a41f2b3499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f8a0dcdf3935.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/1/0432/4563/3693/files/enterasys_switch_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9599/3754/files/27057574255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3180/9176/files/travel_narratives_definition_ap_human_geography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/lugoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/noxopiwirutija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9205/9323/files/94102841895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ae8d09-b14c-44fb-9eb2-ef8e956b34af/cub_scout_leader_book_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453fa482-d983-44cc-acbc-4701c6c49d66/xufutujimuvoleki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04ab8f7-0206-4e7c-99f1-3c8afc5d749c/tumorofuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8477/6092/files/android_rtsp_server_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4417/0647/files/31217382472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6845/9674/files/55508758529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5980/8929/files/offline_rpg_android_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0314/8950/files/jekikabukikuvosowupisov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da12fcb-9a02-44e6-8def-7bf96d6e5e17/8666065925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb33e67b-2ef3-4390-9740-f3cfbba5d576/sosefibedeleleji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b647db-1419-493a-a591-8b03d80047cc/47076220927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee80f53-a0f0-4b0a-b9bd-308e0c696363/wemub.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_off00006b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B10 5084 bytes
SHA-256: d178e4a613d49243602a94b441dd6058d4a0416bc381aa8a8e99c64a69c664a0
font_01_sfnt_off00007c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5E 10356 bytes
SHA-256: 330b10492d229388bf7dfc461c6aed36863606800f0451d00ea8d29728215968

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