Malicious PDF — malware analysis report

Static analysis result for SHA-256 d557a1274816ffbd…

MALICIOUS

PDF

34.9 KB Created: 2020-10-31 01:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 355521cef01e296cc946e05a4f00e783 SHA-1: 09bfe0ea37a65b98fdbc16d179115ed4ff151bce SHA-256: d557a1274816ffbdbe03c1637a9bc7f26c422d1455f02b830d5833381cc028d6
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://cctraff.ru/aws?keyword=decorative+fish+net+walmart In PDF document text
    • https://gosedizomomusuw.weebly.com/uploads/1/3/4/3/134313056/8035728.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/783f24d1.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/xalipubow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5f9ba8ab2669d.pdfIn PDF document text
    • https://didipovewefof.weebly.com/uploads/1/3/4/3/134306756/navufefokiso.pdfIn PDF document text
    • https://relowuforobelo.weebly.com/uploads/1/3/4/5/134528439/cec5addbd82f4.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/1/0508/9001/4918/files/fosaxidadopefejotumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3562/1053/files/67332110706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3573/6239/files/xbox_360_emulator_v3.2_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/tylex_bula_anvisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcff3578-b29d-4104-9d79-ec4362bd52ce/stokes_theorem_examples_spherical_coordinates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/2031/7369/files/dewotuxuvigemisebetape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3739/3049/files/buxaxeke.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_off00004956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4956 5272 bytes
SHA-256: 0eb73d2b3f9217abd70d8e9786833e873d9dd8d9e7789bf63cd11936a1c55b32
font_01_sfnt_off00005b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B37 10688 bytes
SHA-256: ffec36d5498707a54221fa4af52060afe2b41d2d5d8dd1b55196cae4bdf18ba6