Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2477f3450da5df…

MALICIOUS

PDF

42.1 KB Created: 2020-08-26 20:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d20ba1643e80611be552c150e1b67429 SHA-1: 21e1c8edbe41929ff43ddec902825e30656968de SHA-256: 6f2477f3450da5df8b0fca9deb08bc50213373339dfdfd97ce9624174c5bc87f
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/pify?keyword=sid+meiers+pirates+free+download In PDF document text
    • http://files.nupelicanparty.org/uploads/1/3/0/7/130775784/5358534.pdfIn PDF document text
    • http://wowifatod.faithbaptistky.org/uploads/1/3/1/8/131856190/rowosegiwonariw-moxubojej-turaverasaxira-biwumabivizep.pdfIn PDF document text
    • http://files.thebodycoalbury.com/uploads/1/3/0/8/130814132/labokelenupajor-womoraniro-dagixudozonanow-baser.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/1/0439/2907/5867/files/thomas_calculus_early_transcendentals_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/22217808695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/zofufix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/seguwita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/69545474485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/14087757155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/dejevaviwadefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/54633653376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/gunujinitutomibipiz.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_off00006541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6541 5380 bytes
SHA-256: a0630c378268058c3b4e88a84fe69dd0c0de3356007fd67d679801da299b8329
font_01_sfnt_off00007781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 10540 bytes
SHA-256: f1240f0d2ad8315acce4aabe7187a612d06545fead23d56b36ad5569277b06ea