Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ef1f526e9112b0…

MALICIOUS

PDF

41.8 KB Created: 2020-09-12 18:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 445cd11c0e3c262d33d2c7895bb6ebfd SHA-1: 5d71959f053411ca0f90305e642f1ccd4cdd8ef9 SHA-256: 72ef1f526e9112b081aa873f14f800354e664920e35488a199bf4af4544b569b
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, disguised with a keyword related to a school. This pattern is indicative of a phishing or scam attempt, likely using the embedded links to lead the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=st+charles+elementary+school+newport+mi In PDF document text
    • http://gerun.twcnpc.com/uploads/1/3/0/8/130814328/volijaru.pdfIn PDF document text
    • http://labazadu.mel-reiki.com/uploads/1/3/1/4/131438873/gaberefupagumur-robimip-burowakute.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/98e298_a649683d7c884f978aeb33db4c1b0852.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/72216b_26ec3db4fb3546d4bbba5652b8525687.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9219f8_5e3d18cbb89948e39362bc068e8b823c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/77941b_adeec7fd5e4d4eee95b036d6ce08acec.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fa6f14_2fb4974f915f45d7976d933fe851ae15.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3ef64ecb730745fa80d6796dcadb740c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e7897_325ca24e66ec4c74b84e8967c44cc8b3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cfbfd2_07f4e57ef4cc42fd885f8b87f3e2eb09.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a640e9_00019a0d51db40cfa9599a9a6d19101f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/99919028920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/80383309432.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 2

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_off0000650a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 5472 bytes
SHA-256: 58d80e45a4bf0938cee9c34d11e04e273227d8f2b3a9a2cf6c9af6c2630d6f2c
font_01_sfnt_off00007790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7790 10088 bytes
SHA-256: ee05db9c2697e2711ce2e8c1cbbe4dce94e57ed0b99ea4d4dba6f415c471279e

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