Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e40f8ae2e8ce8b…

MALICIOUS

PDF

44.8 KB Created: 2020-11-02 19:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5448c9bf5689ec09c3c2d3f5c9297057 SHA-1: 33358c982a008942dbfbf26c63320ac6502707d1 SHA-256: 83e40f8ae2e8ce8b24678cfd7857cc05b0c4921e88a246e90d190323ef4ba66e
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=printable+prop+bets+super+bowl+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f9e6fbb45db2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f882d34a8671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f8b7309782f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5f8e426370dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f9138fa2a933.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/c3605cfa-7043-4057-9f47-06a59a72927a/yn_560_iii_set_group.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b29ddf6a-4064-40d8-a41b-f826a0a260b1/pajedopizuvaporisiwoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee9155d-a0fb-4f0f-bc2d-134cb4c24c95/vifatibonuxorulisijus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b45d8f-2c7a-4446-b35d-cbced3851e21/87072643464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8dd36d7-ac16-45b6-8eea-84a3cc7ce710/fuwagidak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5198/1244/files/34498219770.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_off00005e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7B 5320 bytes
SHA-256: e114d245320e77437fd3ca00ea68dd82dc6ca7634fbd9911943fa63905bb1154
font_01_sfnt_off000070a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A3 3800 bytes
SHA-256: a865ef71792c9f8daadf306dbd90152d3cdac430ee711bb36144e1d0ca43582d
font_02_sfnt_off00007f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0F 11504 bytes
SHA-256: b5f02658d2c02c9ef9196b4974037fc09aa15c98c253a293ab2a00880079ae0e

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