Malicious PDF — malware analysis report

Static analysis result for SHA-256 c473ab064036d0f3…

MALICIOUS

PDF

54.3 KB Created: 2020-09-10 04:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76c12ea83d4a598d103f8cc4c3d7b734 SHA-1: fc867461ae8b952201dd26d9bab6b659f09c7b58 SHA-256: c473ab064036d0f3712f864e73aadab909874f56471ec1caf72b3033f0c64774
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, likely for SEO manipulation or to host further malicious content. The document body contains the primary malicious URL and several benign-looking PDF links, suggesting a lure to a malicious site.

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.link/wix?keyword=dj+bombastic+2017 In PDF document text
    • http://files.fcaky.com/uploads/1/3/1/3/131383619/wikigogaseri.pdfIn PDF document text
    • http://tefev.westbendpoliceexplorers.org/uploads/1/3/0/7/130739629/72c4311d1975d01.pdfIn PDF document text
    • http://files.salemcob.org/uploads/1/3/1/4/131437736/bokofowore.pdfIn PDF document text
    • http://kigitag.fultonelementarypta.org/uploads/1/3/2/6/132682646/wisuduvosal.pdfIn PDF document text
    • http://ratawopo.marcelwesdorp.nl/uploads/1/3/1/4/131482952/sinujipoxamew_divupuzabike_jivewused.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/5899d5_b016e2aec19b451f8bfeb997cb233680.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/516793_74e606007b944fa2aeec1e20f7682de9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6a44d8_bcfe0d2116184b8d8d5647ddf27acc96.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4d6844_a7fd6271072e4c499573caa59395eb59.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ee6770_6e21d1c57b92431f90dc1119cdd9a015.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc089a_783b97d1e70e43e19ab6d9b71c4315d4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cb2bed_37c6ff0349a04b7ca09938e380daaf53.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2625/0901/files/geometric_progression_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0937/1286/files/medicinal_value_of_vegetables.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000633a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633A 5440 bytes
SHA-256: 82f64d2b88e3c30a26ad25d528c4adccfe16fa352bf20b3c9328c18c5d682f3a
font_01_sfnt_off000075b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 7772 bytes
SHA-256: b565028c6d383cdd14af264a05030b87d47e3ceaff1e2273e2a7ae516c7cd388
font_02_sfnt_off00009073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9073 10208 bytes
SHA-256: 8f15c4cf79bf9d2bd446e98587d6731cfa96f5fb69f4cec775f66415c5168a41
font_03_sfnt_off0000b39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39D 17252 bytes
SHA-256: 4d337d04c88f172ca6f5ca54426671e0c44a5426e3b9806b27546904955aaecd