Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c9618f5e690fca…

MALICIOUS

PDF

31.7 KB Created: 2020-08-14 11:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2d487091bcf135a65f354566cb8a585 SHA-1: 67bd31f2f72f81fa6c1b5c6c60463f059c669337 SHA-256: 88c9618f5e690fcaf78099e6ad9f10e4cfef59a04a423feba58d8818831a084b
194 Risk Score

Malware Insights

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

The PDF document contains embedded links designed to redirect users to malicious infrastructure, specifically identified as a redirector at ttraff.com. The document body, though obfuscated, contains text suggesting a lure related to a movie worksheet, aiming to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links further supports a malicious intent, likely for phishing or malware distribution.

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/wb?keyword=racing%20extinction%20movie%20worksheet In PDF document text
    • http://junarukuz.schaefernursery.com/uploads/1/3/1/3/131398589/nowozagesorumi.pdfIn PDF document text
    • http://files.sufiireland.com/uploads/1/3/0/7/130740211/letexa_babonewose_tozexesavu.pdfIn PDF document text
    • http://tubom.mintzathletics.com/uploads/1/3/0/8/130813834/xikududususag_jitid_tizanowubi.pdfIn PDF document text
    • http://files.chestervt.gov/uploads/1/3/1/6/131606198/beec44b8c8e.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/1/0432/3239/5426/files/9952590628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/kejisusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5888/6806/files/alagaupu_faasamoa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/60185574530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2517/0595/files/apa_style_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/fac_simile_attestato_di_partecipazione.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2597/3916/files/20432150500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/calculus_with_applications_11th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/cvs_extracare_card.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_off00004160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4160 5472 bytes
SHA-256: cd1a1cfa6559370259566d6057735985d4ccdb8c28fd5df078cc89cbc5071398
font_01_sfnt_off000053ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53EA 8848 bytes
SHA-256: 0a4a0870cfff3b70fc25e985b3ed37e0ce197c75e79403619a8477200790a923

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