Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6474e83d271956…

MALICIOUS

PDF

34.8 KB Created: 2020-10-07 00:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f1b2e551aab2ec9817d57d16c8945d5 SHA-1: e0b90b71636530eaca50b845332d5279a0507520 SHA-256: 8e6474e83d2719569b32a61c014ebdb4f76639b2f0282ad5edd90ece6134b027
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://ggtraff.ru/strik?keyword=envision+math+4th+grade In PDF document text
    • http://files.saukprairiehistory.org/uploads/1/3/2/6/132695720/921f1d1859160.pdfIn PDF document text
    • http://files.bayshorerealty.net/uploads/1/3/0/7/130776644/zowasitofuj.pdfIn PDF document text
    • http://keker.schoollibraryoutloud.org/uploads/1/3/1/4/131438330/882a8cc1c619410.pdfIn PDF document text
    • http://files.gsoblackbelt.com/uploads/1/3/2/7/132710676/1454249.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/1/0436/2544/7587/files/dads_cousins_son.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8885/5718/files/mauser_scope_mount_jig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0765/9160/files/sivejezaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2131/9323/files/sekanubiwamatewoxemejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9777/1176/files/abbreviation_for_attention_on_an_envelope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8016/3229/files/solid_rider_2_level_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5db425-168c-46c3-ae7a-ae431ce553ad/tafovufuwuzijab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6deb991d-6bb8-4805-851e-4e02b1f73d3d/28228897709.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_off0000489e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x489E 5312 bytes
SHA-256: 96486151f53be86248bca56a83ce4f2878acd2d136c61c906677197691532f02
font_01_sfnt_off00005a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A91 10848 bytes
SHA-256: 10587430fb8510b66c5b0684a1a4435d92dbcb027e7021d35cb93a5446ad4ca1