Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbcf336e866ce01f…

MALICIOUS

PDF

44.2 KB Created: 2020-07-29 05:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4877584c13b2bf1fad0289d3c17f5c50 SHA-1: 00ac59e582bebecf65002c622d97916635fd4f51 SHA-256: cbcf336e866ce01f1e35d80fa742f967f540ca9a1366f1b1bd82122ca2ad7828
194 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector and part of a link farm, with numerous embedded URLs. The primary malicious URL, https://ttraff.com/pify?keyword=reflection+refraction+diffraction+worksheet+answers, is identified as a redirector. The document body, though heavily obfuscated, suggests a lure related to educational material ('worksheet answers'). No scripts were extracted, but the presence of malicious links and the redirector heuristic strongly suggest a phishing or malware distribution attempt.

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=reflection+refraction+diffraction+worksheet+answers In PDF document text
    • http://files.photography-timeless.com/uploads/1/3/0/7/130775462/meresugukazope.pdfIn PDF document text
    • http://files.storywings.net/uploads/1/3/1/6/131637273/717901.pdfIn PDF document text
    • http://files.spectra-music.com/uploads/1/3/0/7/130776110/2a627083d0856c.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/1/0431/4192/2982/files/30866705827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/17264375250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/24310711679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/xibesozulipatefojogabeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8220/2782/files/masigemasip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7797/4678/files/83662335355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8576/6564/files/juvamafakip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2056/5156/files/bizilufez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/32663432836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/94932243042.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_off00006e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E85 5060 bytes
SHA-256: a168a07eeb629fc524fa941296c2931dc2f2516cca6648d8b6b6bb67054cbc5e
font_01_sfnt_off00007fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBA 10464 bytes
SHA-256: acd52cc5780b8f8784e95cc842a22b9aa448ca0a97fb3c2512a51a08733e2cab

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