Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dda5769b585bc06…

MALICIOUS

PDF

47.9 KB Created: 2020-10-29 12:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: a245c05e670068c061ff1326489b47a4 SHA-1: e1c87a328ea991f4546f225d4864eba4fdf0c30b SHA-256: 4dda5769b585bc06b8720990fb50ee0e278ee6fa1df597e72d249fb9ba284e92
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=obese+to+beast+instagram In PDF document text
    • https://pugojowu.weebly.com/uploads/1/3/4/3/134334477/lixagelerarow.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/8252780.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/a1bbc0921170.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/e149b5e8d534a.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/dojonuta/advanced_d_and_d.pdfIn PDF document text
    • https://s3.amazonaws.com/jolufozo/black_friday_laptop_deals_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61951cbd-b9d2-4030-b634-de2ca065fe7c/wufikofapubosasenefedodef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3822/6616/files/76215760768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/house_wiring_connection_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b142d4-9759-4745-9f53-4cb7cdd8346a/12133091952.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/mass_general_anesthesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6444/8936/files/75297353671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47a1f34-5075-4356-b2e8-cf0b1e006839/zawesupenugopadasiwafu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/anti_aging_herbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33035793-be5f-4ca3-82df-7b403cd50870/jozinoluduvedolukimoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143c1472-eb71-4a01-af65-ea27a1b18ee8/743719803.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/bio_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc677152-35dc-4ea5-9bc6-313af0addc81/60553870445.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/zisivigavazenazoje.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/jagajaduzekunefufal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0176/3769/files/funny_easter_pictures_with_captions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ab5e11-2d89-4d51-9557-32877600c71b/2913868328.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/59169098351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4158/6332/files/league_of_stickman_mod_apk_unlimited_all.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56b144ce-bf37-472c-9d22-de4252fb3a94/benim_hocam_corafya_ders_notlar_20.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/36462578848.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/43476887838.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_off00007a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 5140 bytes
SHA-256: bab751d9763e9e993b5f55732ef340c017b809049e5d5c608a386ca975e55cff
font_01_sfnt_off00008bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD9 11248 bytes
SHA-256: 55bbaa13ec0fa8f8ff08485e848f31ab769de2ffc8d614cf1672b6a5971ab702