Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f7aab8aab1b16d…

MALICIOUS

PDF

40.1 KB Created: 2020-09-15 00:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 009ca41093323981881bcb7ef655473f SHA-1: e91ef10fd24187a72fb464efb6011b9263260dc5 SHA-256: f5f7aab8aab1b16d677ecace1d9b5539cf08d1cc4d2eae48ed13c77656144d2d
222 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lead the user to a malicious site. The presence of a call-to-action button and a phone number lure further suggests a phishing or scam attempt. The document body itself is heavily obfuscated and appears to contain the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.com/wb?keyword=nisqually%20jail%20roster In PDF document text
    • http://files.otiesummerschool.com/uploads/1/3/0/8/130874143/vofimezamonabot_rojifex.pdfIn PDF document text
    • http://files.nbslswim.com/uploads/1/3/2/6/132680781/6900554.pdfIn PDF document text
    • http://bizazepen.jackiespencerbeatleguide.com/uploads/1/3/1/4/131407067/9075426.pdfIn PDF document text
    • http://files.gourmetpieguy.com/uploads/1/3/1/4/131407235/8689015.pdfIn PDF document text
    • http://files.icthope.org/uploads/1/3/0/7/130775001/gudexigagexife-parazudu-xibuwuwud.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/436160_8b6f047c84c9479e8d2dc5f02eb42e6d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6dcf04_6256d33f24904ee3ad5f3285167cece3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d94ae5_baf917e1f71b4dfd9773194c6a290d1e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/tecnologas_para_el_cero_defectos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/99569320881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/41411841523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/guardian_air_conditioners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8444/5864/files/rolosolezuwo.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bc0b97_4bc606bd804c4259b77396cd94591b31.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a59130_4b63469ff82349adad53f0403145ddc1.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_off00005e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4C 4952 bytes
SHA-256: 8b0e78a657e572ee1ee22fe9eebfb7c8a3d530be601697283799ca4b8ff603da
font_01_sfnt_off00006f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F45 10676 bytes
SHA-256: 5b80e365fbe6090108f5485c2d4fdbaa4807e3d05950e4915a21e02990fefca4