Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfbed313469255c…

MALICIOUS

PDF

67.9 KB Created: 2020-10-19 19:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee974bd1b1b0bc7215c16db1d266d4dd SHA-1: e6c9d15979ea12c3b2c2183d4fb0dde8f7c49219 SHA-256: cdfbed313469255c9fa4e69675e6721251df80401c6a7f38930c6ff02d8eb79c
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.link/123?keyword=hegel+phenomenology+of+spirit+miller+pdf In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/rukisej.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/golumudixemaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f8c25ef754b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f86f4d3c1dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8db4b1f1d92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3eb531ed-8e1c-49a7-abb0-5b98f65fa01c/katuvadinupeduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dff49cc-eaf2-4f57-a621-27711a36c675/94697224947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88dd7a46-3e52-44af-9275-47abfbc8e4f6/sukorob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7761df31-3c91-4037-9635-9c590f43992b/tutokiziwazuxidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2435/3960/files/dr._seuss_characters_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/teachers_day_odia_speech.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/68697474542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/nefijadowiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b8287f-ebe9-41b3-b9e1-3d70682d9baa/gufoxapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4375f30a-b09e-44a5-92c5-025f09d8d5e2/molibigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0349e546-f115-4c14-a83b-f4c3dab3722a/52511573838.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA36 5096 bytes
SHA-256: 8703fac98b6f8ff104c766123152670605b8a21ad69b2b9c115948559b36af21
font_01_sfnt_off0000bb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB62 10228 bytes
SHA-256: 5295ebb35f57916e40ea3b8f5646d0c64a44d431d2005f56d8d8cda8f28ccd6e
font_02_sfnt_off0000de9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9C 16108 bytes
SHA-256: 4f5c2c46fc1bea6d698c84397e6c96550f3662020a851a1cfd21f277ee06805a
font_03_sfnt_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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