Malicious PDF — malware analysis report

Static analysis result for SHA-256 551063991fbcdd6f…

MALICIOUS

PDF

42.3 KB Created: 2020-09-13 19:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bea9255cf43dfdaade5da97807a62984 SHA-1: 3f2e09ad76bca8d1b9b9adb72c10dac721b83fe4 SHA-256: 551063991fbcdd6fd69fafe4e0e16d769b00ef964f493f230b18d13b7d998914
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to property searches, potentially leading to a phishing or scam page. The PDF_SEO_LINK_FARM heuristic indicates a large number of generated links, common in SEO poisoning or spam campaigns. The SE_CALLBACK_LURE heuristic further suggests a callback phishing or tech-support scam context.

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.
  • 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.
  • 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.club/wix?keyword=st+charles+county+recorder+of+deeds+property+search In PDF document text
    • http://jefixur.reubenblundell.com/uploads/1/3/1/3/131383544/c01ad.pdfIn PDF document text
    • http://napimi.swbowbenders.com/uploads/1/3/2/3/132303382/tufifefubaxan.pdfIn PDF document text
    • http://files.oagirlsbasketball.com/uploads/1/3/0/8/130874175/4567476.pdfIn PDF document text
    • http://files.bigvalleymidwives.com/uploads/1/3/0/7/130739974/rerituxovok.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/1/0436/3347/5737/files/english_alphabet_learning_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/free_alphabetical_order_worksheets_for_1st_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/24981702409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0183/9517/files/the_masked_singer_black_widow_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2555/3815/files/teaching_strategies_objectives_checklist.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_0e384b9c7a9c4e21b02b4c9a1b75ccd0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_707dd770c9d44046818d941c272db7f4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0a0016_a1da6da856c143c6b1e299a9fabb8ffc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/81ef4b_1b4604a4039f4369b13f13f69251c37f.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_off0000663b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663B 5448 bytes
SHA-256: 198cc53b6928834259a2dab97c13f1d17f66a556a99bf85d5927a157a0120cb7
font_01_sfnt_off000078c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C8 10372 bytes
SHA-256: 1265820def2ba56e103667c7822cf88db3b138a6df2b251772dbd0c31aea1f0d

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