Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f23f1b3206a9edc…

MALICIOUS

PDF

54.6 KB Created: 2020-08-12 15:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e750303f186f1ca0220a90344e9b578 SHA-1: 17d98e79756618f9f643cbd18bb1c8ee3794f65e SHA-256: 4f23f1b3206a9edcb6bfd803584e5e981601e782c311fc3bb8243955e97e8168
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL, https://ttraff.ru/pify?keyword=aristophanes+wasps+pdf, is presented as a lure for a PDF download. The document body, though heavily obfuscated, contains this URL and other links, suggesting a link farm or redirection scheme to distribute further malicious content. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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.ru/pify?keyword=aristophanes+wasps+pdf In PDF document text
    • http://files.lynnettejessop.ca/uploads/1/3/1/4/131438150/rivow_jevivenix_sapevedazex_vaxig.pdfIn PDF document text
    • http://files.wtho.org.nz/uploads/1/3/1/4/131483249/d7395d7ad6f.pdfIn PDF document text
    • http://files.ndahabbo.com/uploads/1/3/1/0/131070230/80bc56c2569.pdfIn PDF document text
    • http://sibepusa.weldinghelp.org/uploads/1/3/1/0/131070109/baeb46a8cd80d.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/1/0429/8424/3351/files/4069961546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/22936598235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8187/8942/files/vupuxilufebiwivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6469/files/33526468817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/43358598860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/72020682085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/proverbs_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/fapedix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4977/0408/files/74738594171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/wisekakakizewavudevu.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 5

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_off00009955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9955 5180 bytes
SHA-256: cf766d515529ef781ac8dfab8435e45364cec219b463d64b3be518eac10cce3c
font_01_sfnt_off0000aaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAF7 10192 bytes
SHA-256: 2aa46bc85bfd568fec2d8eb267d272d81cee2957bc35ab364b916d3383b48384

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