Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c2ce9a3437e8af…

MALICIOUS

PDF

43.9 KB Created: 2020-10-28 05:02:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 31caebe06998367500c9071ecf1985ac SHA-1: 734c362d829c50899b11658c143faf36b6cfefc2 SHA-256: 33c2ce9a3437e8af1a4e7f9eae10375d4d9fc243f315ed3e40db8d55705c03e9
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://gettraff.ru/123?keyword=nandog+dog+toys In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_5f989c062b4dc.pdfIn PDF document text
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/winekup-gorotalovanez-tadaxevifaf.pdfIn PDF document text
    • https://kuzikumivinoli.weebly.com/uploads/1/3/4/2/134235757/4b71ce7.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/peparaximezur.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/1/0500/0308/3424/files/14th_century_english_clothing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8396/7896/files/tanker_endorsement_study_guide_florida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7646/1759/files/japakeziloguz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5865/4105/files/pixajopuvitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8575/0976/files/70897724703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/4687675245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1560/1827/files/cisco_packet_tracer_7.2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/mizimepuraripodeperosimoj.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/motukokinu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/motazebaderewaxagaxem.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/64081354178.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/golper_boi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/blockchain_technology_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e378857-eb21-4276-8c2e-26eaa7207265/71005410638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de905abe-5316-4f09-904a-243237ecee92/64867964453.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_off00006e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6A 4936 bytes
SHA-256: 6dd473697df82e7e34b02611ad5d5508f2e48ec8ae4bf71c361ae8d9fa7e7d23
font_01_sfnt_off00007f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F55 10380 bytes
SHA-256: 64280f57b1f85b5e8adce37d2a2128a72db526c1e2357a87336b23978e6bb8fb

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