Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f614b955cb665b7…

MALICIOUS

PDF

42.8 KB Created: 2020-10-15 11:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c3c6b0d721d241c397aa49a9f1a00e4f SHA-1: 800e923fc96a20331c672f1e39dc8dba34bc2951 SHA-256: 4f614b955cb665b792e384253d8d2ab640ad93e75475a4ac20cfd94aef25f6cb
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=lavender+town+tower+guide+let%2527s+go In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f87df9139153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f873538aea82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f87b72c3765a.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/7294463.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/9823855.pdfIn PDF document text
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/ponime.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/9f15aa5771fe9d.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.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/1/0440/1682/8581/files/algebra_1_textbook_mcdougal_littell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2667/3575/files/8794877724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2242/4480/files/85864684652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2874ac1-02f1-4d1a-a649-a6f9443d7780/4658411022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d29dc2-db05-4bfb-9af8-01f29cbd20fd/35882920178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/mumapovujoxagawen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7270/0057/files/fool_in_the_rain_drum_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/ruvelepaxuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/19608271245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4963/7792/files/44688694852.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_off00006949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6949 5120 bytes
SHA-256: 1d7162fb6ba1d2837015cc787d65f70cfce968d0a6b7d0ffaeab1adfd4c8aa14
font_01_sfnt_off00007ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE2 10360 bytes
SHA-256: 5a127c3929d70d782a6e472ea96c931f174e5582ad0964c06ed7f900dd22bd20

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