Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4dd38a28284072…

MALICIOUS

PDF

45.5 KB Created: 2020-10-20 09:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 637f92d0e4c6d013fd11c6aa06278778 SHA-1: e9753505ccd07bfc93a9b2875a625f6e424605bf SHA-256: 7c4dd38a282840729b569e6586b58c78c869f662facb994cc6321fdc638ea8a5
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/pify?keyword=octopath+traveler+passive+skills+guide In PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/vedus-jolizo-gipomodena-rivuvoz.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/7476327.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/1201412.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/2611463.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/1/0266/8937/2329/files/doxuxapukapawawulelidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0587/0758/files/lusimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4644/2405/files/quran_pak_app_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5136/3735/files/we_are_not_alone_god_is_with_us.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7749/1618/files/lathe_machine_parts_and_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6024/3879/files/youtube_mendeley_web_importer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8161/9870/files/98575671099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ce3ab6-c074-44bb-9cec-bcc3b2b4bdaa/vajade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a60141-ac3f-4029-84d4-848c5901a7c3/letinazafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbc71f5-8cfa-4545-b4e6-0f16376a7206/83842453493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579e0f1d-2b17-4a2a-a302-4cce6303d7da/bilekitefiwogutav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7001e9da-9a01-40a8-a846-3eb97d9d6862/woxafaxabesevapiraleruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbef94f8-ae7b-4fa5-9890-e9f92802276c/27632469009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f8fd1d-a5f9-4a19-911b-7422a7e88ebf/gutizizololexok.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_off00007381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 5484 bytes
SHA-256: c0bd4c221d22deb2f298237d91f8fa3c830aa09f005b396dcc602ce1a5b50182
font_01_sfnt_off00008622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8622 10048 bytes
SHA-256: 72b72ecc53c1827a055f2866a821e6a4de878432c2cb68baf41009396dcc146b

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