Malicious PDF — malware analysis report

Static analysis result for SHA-256 cefb15f0d2d07b02…

MALICIOUS

PDF

45.1 KB Created: 2020-08-10 05:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 12b3f7823280db5fad4df02e67b47f6b SHA-1: 13b16e52dc2adc30b549e3fdfd1d0ef5cf8206ac SHA-256: cefb15f0d2d07b02c764fda5a1372a3801f49752e39b627098d9da68c3fd09d3
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service that ultimately leads to malicious content. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. The heuristic firings indicate the PDF is designed as a redirector and a link farm, aiming to distribute malicious content.

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.cc/pify?keyword=s+chand+physics+class+10+refraction+of+light+pdf In PDF document text
    • http://wexemizef.lilyhock.com/uploads/1/3/1/0/131071164/xufubuvir_zekiginatug_duwukufidonat_mokejegusi.pdfIn PDF document text
    • http://gewipafes.mineheadareadetectorists.co.uk/uploads/1/3/1/4/131454012/2861672.pdfIn PDF document text
    • http://nutexur.vellfitness.com/uploads/1/3/1/4/131453574/sexan-suwad-xawolujetigog.pdfIn PDF document text
    • http://files.jeffnickell.com/uploads/1/3/1/4/131406663/148596.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/1/0428/7689/5398/files/58486209641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/19332568586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4586/2041/files/kabbalah_magic_symbols.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/61144253038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/robifiduraze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3364/7525/files/xidem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/tomomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0363/9970/files/pdf_to_word_converter_software_download_for_windows_xp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/13536281225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9276/0981/files/adjective_phrase_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1490/6279/files/google_atari_breakout.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_off00006d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D93 5816 bytes
SHA-256: d0e4e0357a39b8aa6b86a62527bd74b9c0884dec7d674c3d6cb21e1acc20b98b
font_01_sfnt_off00008168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 10420 bytes
SHA-256: c389402f6fd36a1d59b3c84c009a5297afa4e6b9d323f516de1cc452b6827b58

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