Malicious PDF — malware analysis report

Static analysis result for SHA-256 1297fab2584c14a5…

MALICIOUS

PDF

40.1 KB Created: 2020-11-01 07:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f4af195d8ed035fd0ef1ff49f299f222 SHA-1: 529c2b1bb567bf3226ea82f4f631bb7f69f817b8 SHA-256: 1297fab2584c14a5da5255bd4e9482bdf340e6fc786ea1162e2a908510916a7f
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=dell+inspiron+2+in+1+15.6+touch+screen+laptop+i5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f91402d73ccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f8d69414cc08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f89e158cbe55.pdfIn PDF document text
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/3795560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f8b0733cc5f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f95e9b733e3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390323/normal_5f94e447538eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_5f93a1506df10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f906d6e5a0d0.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/1/0481/5726/1977/files/47820661606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/3010/7057/files/23494262348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3108/0345/files/ancient_china_laws_or_moral_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2079/0178/files/nezupexefixirevexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5426/6049/files/tubewovonomuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2888/7706/files/17236756743.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_off000058ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AB 5516 bytes
SHA-256: 71d04c8134b98c508445f4fd97fa2b98f6a461e6957867844952161084f273d2
font_01_sfnt_off00006b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B75 11904 bytes
SHA-256: 2d0ff12a37c941f6f692275c7b01e80049cda209d47cdee44605deb8e3bf8f27