Malicious PDF — malware analysis report

Static analysis result for SHA-256 61914c2f22ee23c7…

MALICIOUS

PDF

36.4 KB Created: 2020-08-18 22:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a97288d9faa1c175eba024b1e8d34328 SHA-1: 081e973500d3bd62e60b5ad5c487445aeea1afb3 SHA-256: 61914c2f22ee23c782009cbc84753847d8028b9356641d1c016c9ab9c96fdf7b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains text related to worksheets and URLs that appear to be part of a link farm designed to attract traffic. The ML classifier strongly indicates maliciousness, supporting the conclusion that this is a phishing or redirection 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=masculine+and+feminine+worksheets+for+grade+6 In PDF document text
    • http://files.davaocityproperties.com/uploads/1/3/1/4/131409309/jilubigat.pdfIn PDF document text
    • http://fiwire.defenseofthespecies.com/uploads/1/3/1/6/131606490/wusaziliv_gatikor_rezafutefip.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/1/0427/8039/3639/files/zopepedeluxomin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/48717023254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/zodadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/zuzujebububerabifabadinik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/big_data_hive_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0952/2339/files/7536818231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/18641874142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/excel_whole_sheet_greyed_out.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1778/8830/files/36871894501.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_off000046d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46D4 5748 bytes
SHA-256: 25787a7721a00f739f3ccaa24db53be95999d8caeaab8f6130c935a7ef480c3f
font_01_sfnt_off00005a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A52 13568 bytes
SHA-256: 206cd92fe1f9465302d34cccbf29eb3b78880ee59a9c7b6d7a9c26b8c12437a0

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