Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf5f287bb5e9b94…

MALICIOUS

PDF

54.1 KB Created: 2020-10-19 07:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2d87ce68b9d4f367deceb1f20a68da81 SHA-1: e7f722f539810fe155ffcbce85fdbc60c45b6d96 SHA-256: 5cf5f287bb5e9b9400e51e672776feea8947c209d09cce1e4f529e2a0ebb010b
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.club/123?keyword=vatican+museum+self+guided+tour In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_5f8ca3b22ae44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f8870bb7d09b.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/1/0480/9280/7332/files/red_river_gorge_natural_bridge_camping.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/kendig._enfermedades_respiratorias_en_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/rakonuxotaxilakil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2393/9753/files/98619028882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/fuzififomugemeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ed6e6c-12ef-466c-903e-8ce378badedc/92626497282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e62abfc-875e-4524-9422-cc07c294fd15/92486970484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22917cf1-af44-4eee-86a0-da41ace07e18/sewumopusekugiwawamirobaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b58b399-2c02-4941-ba17-190387341289/9933459753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446766ba-bf98-414c-af50-b1e6690ae316/wonder_tactics_tier_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb11506c-e392-43e8-ad55-7149fdc41128/kuvobusozebukid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0607/3253/files/heathkit_sb_220_assembly_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1187/4716/files/tablets_with_usb_ports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/gikufofumuvixumon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/57894219320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1441/1672/files/kasaweralosev.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000660f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660F 5588 bytes
SHA-256: d41dd2a7916fb5309eaf9507cdc7847779dfc0542ff90758a53adffd8fba454d
font_01_sfnt_off00007998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7998 5304 bytes
SHA-256: d627c1df4d0107d52b313ca90ddeb94b56c6f4b9885d7894463e51d2ff8b5463
font_02_sfnt_off00008b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B86 11592 bytes
SHA-256: 7f68777ee740bfec072f1d9445dd528c746b95de4b66e6cdbc992c59b0ebd783
font_03_sfnt_off0000b350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB350 16612 bytes
SHA-256: a0f0f1354c9ff62f90f9933709b4b0b28a4f7ac2a8b42ca1e7e9e8d6581bed15

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