Malicious PDF — malware analysis report

Static analysis result for SHA-256 633b1dfe4db3f176…

MALICIOUS

PDF

43.5 KB Created: 2020-08-08 01:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 440ec85ff0926d85174533c425edbbfb SHA-1: 793ab58256d4b5ff549b8146e7995a68248e91b1 SHA-256: 633b1dfe4db3f1766f44a47a44fb8347661f38a5d523e175a60cf8b6aa5cb94e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to create a link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector service. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for phishing or malware distribution.

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.cc/pify?keyword=business+recorder+newspaper+pdf In PDF document text
    • http://files.prayingoutloudfoundation.com/uploads/1/3/1/8/131856956/ginotoxokusoruk.pdfIn PDF document text
    • http://bofoxuwi.jfkjrotc.com/uploads/1/3/1/4/131453133/vufeti-takuvusinad-vawudabope-puvalageram.pdfIn PDF document text
    • http://files.theauthenticitycoach.com/uploads/1/3/0/7/130776073/sunosu-bagizisin.pdfIn PDF document text
    • http://files.hqrecordingstudio.com/uploads/1/3/2/8/132815388/e293e7dd3994073.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/1/0428/3550/9415/files/wupunuxujibofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/21629585861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/acuweather_enfield_nh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/58967087025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/jojavaletifagimavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/kobib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/jilep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8571/6901/files/zivuliwamafufiropax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/87912067473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/46521300509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4750/0448/files/lamome.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D14 5260 bytes
SHA-256: f04dc8af6797668a66725abd9f8ed552fe3c8879585cff894ea232230cd3de47
font_01_sfnt_off00007f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1D 10032 bytes
SHA-256: 8662ad9bfec5d7d6962f660216002b79e0017339cbf41766e7157e4be0621a50

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