Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1407d31e812799…

MALICIOUS

PDF

39.4 KB Created: 2020-11-01 23:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a935930fd27272869695e613c0094ab1 SHA-1: 0628b7c6d0f6816474191e4d477c623c38ecc082 SHA-256: 1e1407d31e812799e0f2b02885408c478c71589056bfbc0dbb834f0c2a3f77c0
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.me/123?keyword=tnt+flinchum+blacksburg+va In PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/bofejo_minawasapiw_bixav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/behavioural_science_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4202/0769/files/best_3d_games_offline_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/57746130193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6796/1244/files/sotobanamor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/weight_watchers_flex_points_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/sukefutakewogiduzig.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/14174985508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4300/3809/files/36808052894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0344/3862/files/magnetism_worksheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/mean_median_mode_formula_with_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/dokofikuzaki.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/naxogaman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5787/6644/files/kitoxenepunukepafo.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_off00005a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2B 5508 bytes
SHA-256: 5340407cad9be0ea7d482b2e6a85984b608ba861da53c04b321f1c7c5d0831b9
font_01_sfnt_off00006cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC5 10488 bytes
SHA-256: e13515cbecd54a5364ba976dfc04f3b8f304320a790a77d2e0a4d535b17f72a1