Malicious PDF — malware analysis report

Static analysis result for SHA-256 4495e299c89bec47…

MALICIOUS

PDF

43.5 KB Created: 2020-10-07 21:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 187f427e2e03752301f4dcdbc14b460d SHA-1: 20ac8b09fb170a28f5ce43740fde895edf7c948f SHA-256: 4495e299c89bec4733415fe159e91790dd6df44de5ef809252abfa10e2e028fa
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=sublimation+printer+epson+7720 In PDF document text
    • https://site-1040008.mozfiles.com/files/1040008/50947320324.pdfIn PDF document text
    • https://site-1041498.mozfiles.com/files/1041498/6486541081.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/duxiwuveza.pdfIn PDF document text
    • https://site-1043195.mozfiles.com/files/1043195/wonodajinufodomixeb.pdfIn PDF document text
    • http://xupub.shop1248.com/uploads/1/3/1/8/131857204/212ecae0f42.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/1/0460/0899/1905/files/conventions_in_writing_espanol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8424/3363/files/advanced_race_guide_pathfinder_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/drivers_license_office_louisville_kentucky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4214/3389/files/22825871432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/65200489929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/turideridelivanuvefotoner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1867/8182/files/public_relations_media_plan_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2050/7546/files/bedofofetil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/19855500522.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_off00006c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5B 5564 bytes
SHA-256: 3f1036fbb722b41d211e8efafa36f325dd5e21dbee997dd9ff661c4500702b79
font_01_sfnt_off00007f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F29 10008 bytes
SHA-256: e91e717a7143902e0ccf59bd127f4a879986c6a3bc91f8cdb4154e64d4e000d5

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