Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3d422c0737b7e4…

MALICIOUS

PDF

43.6 KB Created: 2020-08-10 17:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5e80fa41338ff17ba64811c242ab7fa7 SHA-1: 4810f6033f0733e6ddb19f6dda8bf7a8152ac992 SHA-256: 3c3d422c0737b7e499ec18f1f3abe5638238d8baf95cb4c29359bebdcb2d3c43
194 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to appear as search results for a popular textbook, but the primary link redirects to a malicious domain. This technique is often used to lure victims into downloading further malware or visiting phishing sites. The embedded URLs suggest a social engineering tactic to disguise malicious redirection.

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=harsh+mohan+textbook+of+pathology+8th+edition+pdf+download In PDF document text
    • http://files.chenowethbairddesign.com/uploads/1/3/1/8/131871894/kawal_fudomur.pdfIn PDF document text
    • http://files.shariedavis.com/uploads/1/3/0/7/130739288/xeriso-gubukare-xejeg-nevunamuvati.pdfIn PDF document text
    • http://files.jameswolverton.com/uploads/1/3/1/3/131383771/8821067.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/1/0429/1140/0102/files/arabic_alphabet_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/maharashtra_state_board_biology_textbook_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/letowopebofowebizuwir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/19066760365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3446/7752/files/sejijane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/51570730715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/94674113650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/wavovemozano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/accuweather_in_newark_de_19711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/91517980004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6825/1543/files/91366568943.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_off00006938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6938 6076 bytes
SHA-256: ca1260a3a260ef27b9fae0757513e1c140155907fb972187e62feff7f008a70e
font_01_sfnt_off00007dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD2 10708 bytes
SHA-256: 3c77cceb942cd6eba12d09d12202d225db618f0c6f2ebf7c6306933946477b2b

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