Malicious PDF — malware analysis report

Static analysis result for SHA-256 36425944c71e33eb…

MALICIOUS

PDF

62.8 KB Created: 2020-10-19 19:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3a17ea39ec82070af0cd52d370f96929 SHA-1: 70b5403f1638a00a5cba7366b003a20be022ce6b SHA-256: 36425944c71e33eb9fd04be6ea012d48901270cdee29e3429bedc0d07e5ad074
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/123?keyword=manual+meaning+in+law In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_5f8daaa6bacf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8d44ca6f8e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f8766cf8ac52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f8d42e152f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f8a0b1b98ffa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_5f8ccb199e14f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5f8a2cad1016a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f8ac0617937f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8db748c2399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5f8db77d8b31b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8749741c4f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5f8db37b3b962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f88c02861dd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5f8cfe2a5aebd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f8dafed6b29a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f8d900f0845e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f88f901359cd.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/1/0431/7115/2023/files/google_ricerca_tramite_immagine_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4519/8237/files/phonak_roger_pen_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3916/2005/files/power_inverter_1000w_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/free_geometry_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5827/2677/files/78186457290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8217/8979/files/69971800852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/pocket_radiation_oncology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/the_statue_of_liberty_was_damaged_because_of_acid_rain.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7838 20132 bytes
SHA-256: 4e8bd98dccc81a0202261437196b70dde9ea650b264c2b9e22bc64b1b70020a2
font_01_sfnt_off0000b8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F6 4828 bytes
SHA-256: 78c16f25a2c2eb7e280e6c9aac864018a96842ff13b546c90da426e574ffb0c3
font_02_sfnt_off0000c965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC965 10816 bytes
SHA-256: 917f4b8cde68fffe859d6df1af2b00c8592ed81c98e408ad9a68658fce2b0c9d