Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f9eff311a42077…

MALICIOUS

PDF

44.1 KB Created: 2020-11-02 05:21:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 13fd80b64244afd62e4ec734d9afeaeb SHA-1: accab906ce4ba488fcf74a048747b4607b97771c SHA-256: 77f9eff311a42077c9f169435bebe0ef7c2090a91bf12644dd664eb6dfaf7bbe
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=civil+air+patrol+encampment+home In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f8e3052bca7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5f9ca367aa3c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_5f9a46bd277ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f9124f766e74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f8aafe4b7e73.pdfIn PDF document text
    • https://xuxefakeni.weebly.com/uploads/1/3/4/2/134234722/8e154d2fc71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_5f9ba5521d86b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_5f973cf13e9fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/55108137843.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/sixotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5262/4803/files/79556261042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5931/7398/files/kumenewutakizadovo.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/dibezin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4812/4575/files/histerectomia_piver_1_2_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3489/3718/files/toms_river_park_and_ride_directions.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_off00006b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2F 4960 bytes
SHA-256: 3461729b10c98c6ddb0a4350bf9d8e89cb783b7698489b720566cacc7f7367de
font_01_sfnt_off00007be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE4 11548 bytes
SHA-256: 7f5daf0ae98238cfc5a3eab19431fed27a73873b83b37abb4cf30160c33c1ccf