Malicious PDF — malware analysis report

Static analysis result for SHA-256 277568eab7222593…

MALICIOUS

PDF

37.3 KB Created: 2020-08-06 22:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e9f1ecf7afd0a03469df55169a108ff SHA-1: 564f1ad0155f81f3fca16c285a60e5a76351d341 SHA-256: 277568eab72225937f5a3a5c3158774972861116eab225571a8113af2141d48c
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.com/pify?keyword=phases+of+meiosis+worksheet+pdf, which is presented in the context of a worksheet lure. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=phases+of+meiosis+worksheet+pdf In PDF document text
    • http://files.focusedlearningsolutions.com/uploads/1/3/1/6/131636990/49d8e9.pdfIn PDF document text
    • http://files.theaudiobar.org/uploads/1/3/2/6/132680990/3671839.pdfIn PDF document text
    • http://files.light-sup.com/uploads/1/3/2/6/132681002/lolonegesositub.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/1/0437/5520/8858/files/aerobic_dance_exercise_instructor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/24973763579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7423/8102/files/76097669597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/33286009727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/64972157422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/astro_2nd_canadian_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/2826605951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0904/0803/files/46261333738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/29654559133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/lanuwanadisulajumoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/jiwupinudoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/52088892673.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_off00005656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5656 5408 bytes
SHA-256: 95b1b2ac2017a9393b7616d2f22c8b83a3c36df490d94457a56a413d8fd30b6a
font_01_sfnt_off000068a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A2 9412 bytes
SHA-256: 46472a9425ca10660a52bcc00c819950c11b1e4074fd5b7c836db308d1b2c18a

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