Malicious PDF — malware analysis report

Static analysis result for SHA-256 5750854fd1ebeff5…

MALICIOUS

PDF

42.1 KB Created: 2020-10-17 00:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: ac94fe6b4c8b3a76c852b11923c9ce21 SHA-1: f23d5d481bda0c2ba47ee7b299d3bf260a9797ab SHA-256: 5750854fd1ebeff575a08848df180fcc50a1fa18882a3297b7d9915360676101
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.me/123?keyword=mario+kart+tour+apk+download+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f896662f019f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_5f8a0fda4776d.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/foxokunejojasek.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/2467228.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/nibirixuvigezux_wuzigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f878c60ca137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f88648f2a57c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8723f6e7d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f871cfc4a2d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f880ec955704.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/1/0499/0877/7118/files/dezaniro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4865/5784/files/xazobawulokizinak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9246/9669/files/sesavunedusurodefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3116/6615/files/fundamentals_of_body_ct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2334c2c-120d-406d-82fe-605d39d13c60/mopazuborex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446b3649-6c5f-44ab-be3c-b909c61c8fff/27137706714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38dfdad-18c0-4e0d-9562-49fe3c9a9e4a/92234450079.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_off00006596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6596 5020 bytes
SHA-256: b44b630c4d4554101245f0485fc54a03f018d83678bd1b292a01d8a863071285
font_01_sfnt_off000076d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D6 10668 bytes
SHA-256: e169e4d0550c71fbdf1f746bc8388f09f9405cd8b4a792fd7b94f9d54747715d