Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5cb634495e27f3…

MALICIOUS

PDF

56.7 KB Created: 2020-08-22 06:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 56c4856a94b0d40dab9acc485dca5cb4 SHA-1: 066a80d2c6f30321a9a7868326ac6bc505c63710 SHA-256: 8c5cb634495e27f330f96f7c325dcaf93d8d16378af83d02635e3c6aedc1510b
202 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector designed for SEO spam and phishing. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This indicates a phishing attempt disguised as a document download, likely to harvest credentials or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cdac+exam+papers In PDF document text
    • http://files.exoticfeeders.com/uploads/1/3/1/0/131070918/jexijafokubi.pdfIn PDF document text
    • http://fetoruze.worstplayer50.com/uploads/1/3/1/4/131406071/303fa2aff64f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7555/0876/files/50531707286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/nakorevisise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9664/5536/files/91344832109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/tarezasowag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/css_grid_template_responsive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7766/2875/files/descriptive_writing_worksheet_ks2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/circular_array_queue_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/gesinupizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/29570675937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7436/3048/files/iconics_training_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/vector_algebra_maths.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3699/9833/files/dexawonetenukavivuxajuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8442/2051/files/amnistia_internacional_venezuela_informe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/learn_kathak_dance_video.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000731a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 4724 bytes
SHA-256: 0a84c256b9060fe8f3667993343c6f9e4dac646a9745a7deaf6184c0922eec28
font_01_sfnt_off00008317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8317 2320 bytes
SHA-256: 026de1076dad6614fee7b4839f066e743e4238b5ddea94259138cfcd618330b4
font_02_sfnt_off00008d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D69 10404 bytes
SHA-256: 992f69c5b7f179f4c273a9346989725d9fe782d0ef936907e9f473c332f4c793
font_03_sfnt_off0000b0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F4 16284 bytes
SHA-256: 02eb72310c77882d7c7d6d87c01b160a317d8f3702357d62d98d6e22e5499f18
font_04_sfnt_off0000c693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC693 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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