Malicious PDF — malware analysis report

Static analysis result for SHA-256 27182e639b355c63…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 12:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1917bff513dc6db9c99f3ee1718dd677 SHA-1: 0b7ac45570be0b683fc54bb8ab9879cf104eee5f SHA-256: 27182e639b355c637325d296561407249a8272a3bc618ed89947a17a31405750
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to an 'irregular yo verbs worksheet', which is likely a pretext to encourage clicking the malicious link. The presence of a callback phishing lure heuristic further supports the malicious intent, aiming to trick users into contacting a fraudulent support line or engaging with a scam.

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.com/pify?keyword=irregular+yo+verbs+worksheet In PDF document text
    • http://fopazif.titansinvite.com/uploads/1/3/0/7/130776255/ramiwuzaju_tirotuz.pdfIn PDF document text
    • http://ravifixi.bearsreg.com/uploads/1/3/0/7/130776167/nedotu_nutugimuzisav_tawefogadulotiv_zelobukas.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/1/0436/8056/3350/files/17071166212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/summary_writing_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3517/8661/files/joxiser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/pdf_pendidikan_agama_islam_kelas_10_kurikulum_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/52834826549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/33192864495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/rerumanodubamore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6907/files/mitosis_in_onion_root_tip_cells_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/52784384151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/87503024044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/rodilofiwufijipujoxuzon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/retilelefuleseki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0689/2960/files/the_choice_for_love_barbara_de_angelis.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 8

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_off00005bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC5 5340 bytes
SHA-256: 23e771e473f6cb452dc8ef07ff354494600b4efb91d26c4ad170435d8e13eda8
font_01_sfnt_off00006e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E01 9880 bytes
SHA-256: b83e8d309f9b34bd89eafee414a8ba53f9e2c4eeca1ba47272a2a87cc42252b1

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