Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77bf62d6212239c…

MALICIOUS

PDF

38.0 KB Created: 2020-07-25 19:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 417ea7a9d61789ff436f189f4fb3f9ce SHA-1: 200586b6a203dc1e90fa8525343e56620300e7a4 SHA-256: f77bf62d6212239ce433d81f0de774d1c2b2dfcc913daf7b8189fe001f9e4249
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links, 'https://ttraff.com/pify?keyword=mitosis+matching+worksheet+answer+key', is flagged as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'Mitosis matching worksheet answer key', indicating a social engineering tactic to drive users to malicious sites.

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=mitosis+matching+worksheet+answer+key In PDF document text
    • http://files.eazicandle.co.uk/uploads/1/3/1/4/131438692/ef1440aba9152.pdfIn PDF document text
    • http://files.homesweethomemusiclessons.com/uploads/1/3/1/3/131380754/zanirulibowi_vomidomosamenoj_fozugeke.pdfIn PDF document text
    • http://files.caseylynnroland.com/uploads/1/3/1/8/131871553/2f2f2cb28917754.pdfIn PDF document text
    • http://files.atxalive.com/uploads/1/3/1/4/131438282/retepafemuna-dogazojebuxovu.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/1/0432/9901/2766/files/pedusonen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/likogob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4217/6150/files/wabojivimapasidedumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xazome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/70257564954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/vowuwapinigigedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0928/6042/files/46940528379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/zulazom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7121/6542/files/saziz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/dinilipatevular.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/burirodilepekimibugab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/11610646718.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_off0000586c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586C 5232 bytes
SHA-256: f8fc95c80541c37451c66d6c41da35ef716a45272adfcfa609c5ac55d9232031
font_01_sfnt_off00006a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 9568 bytes
SHA-256: 53671b39b3972da46656b40859866d476ffe4f62f4ad819d4ee06e93918055c1

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