Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ba351c29f9acb6…

MALICIOUS

PDF

38.1 KB Created: 2020-10-25 11:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 2b51119aeeb0493cb90d091934aa8ded SHA-1: c9e7c657996dd1b3e15e9410d4f72869c3e298c7 SHA-256: 00ba351c29f9acb68f0638549416213605da466df4de2e43583fc5f86a7112fe
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=indian+express+epaper+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5f8ce65792c6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f8d8d2d36f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5f89d9fd0b540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5f92ebd13f3cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_5f93ecf02ce65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f94b448a6bb3.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/1177193.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/36c0363254c.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/3231186.pdfIn PDF document text
    • https://vatalinonabalix.weebly.com/uploads/1/3/4/2/134234662/gusoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87312d88900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5f936cff3d21f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5f92a4b52e7d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f87c694568ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f8c82de22b32.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/1/0501/1020/2013/files/voxijeviget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9020/6101/files/mexamotogerozajen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1834/0520/files/96911630163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4730/5635/files/gikigebepudufulavumej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0376/7713/files/gipuzowuxixatekumu.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_off00005717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5717 5008 bytes
SHA-256: bdc00b4223960797b813e9af1f3356d0ceb7be696e8638830b1ad4b2abff24ce
font_01_sfnt_off00006830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6830 10380 bytes
SHA-256: a64c1aeea58f40a0bda9d34684bb6f9ad1a25947a05de5d996795438dc4f8c1e