Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3fb3a227f3fdb2c…

MALICIOUS

PDF

55.8 KB Created: 2020-10-24 09:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 060eb398f0a414e9d1fc8ff9d0c2ce13 SHA-1: e09c8ea1c274fac8faf054a7237d98dfb08974eb SHA-256: f3fb3a227f3fdb2ccff4f1533f4fbff33e047198fb6c73633e333e0bf5f576c3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/aws?keyword=swedish+adjectives+list+pdf In PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/5709855.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/0ab38a.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/2748195.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f887dff7201c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8ed93eeaf4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f8b159858d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f8903ed00484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f8c4b8f53a68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f893e1aa0660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_5f917d8b44ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f86f8d950a12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16f9a67-1848-4ee7-b73d-92997a3b5e40/24189440747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d01da7-30cc-491b-ba0b-612e5fa16258/vuzerokukod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16c664e-327d-4763-b780-81168dcfc2ff/48723744640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9f518a-9b98-4987-8d00-eb9b0d3a1a43/roret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28512f73-80f1-459f-b817-e9ba9da5e237/kifufasotatetidumizo.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/kekawesokoko.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/tajupitujo.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/kebomusoweredekumawamivi.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/administration_des_affaires_cours.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/math_minutes_8th_grade_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/asymbiotic_nitrogen_fixation.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/7362084020.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_off00007552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7552 5476 bytes
SHA-256: a34e420732235e251e3f82c30ab10f9e3428e57e55d5ecb379867bda43c048f0
font_01_sfnt_off0000880f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880F 3056 bytes
SHA-256: 6a0e550766a180d0f0f2b7d0cae4eed948e939e1bd6b31472fa28e991e8563b2
font_02_sfnt_off000094e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E1 11424 bytes
SHA-256: 9979e0437a964ddccfa0f7c6c0cc2b2e74e2d42769c3410ee8e307f15d45f1c4
font_03_sfnt_off0000ba88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA88 16088 bytes
SHA-256: 700ff7bf493bf9bab5e7bd19ce07725d6ad682c9ec1bd4c381fbd4d74ba1924a