Malicious PDF — malware analysis report

Static analysis result for SHA-256 5280d5b3bb23ca4d…

MALICIOUS

PDF

44.4 KB Created: 2020-08-05 04:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9a437c2f7e497e7eab6d847f34f60fc SHA-1: af650db05fae1de2cb45dfc5c2c705a37b5b2dfe SHA-256: 5280d5b3bb23ca4dcbd54602fb68e238f56fbbcc20da00a19e83fd03df8ae4b4
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the string 'Civil engineering book pdf bangla' and the malicious URL 'https://ttraff.cc/pify?keyword=civil+engineering+book+pdf+bangla', suggesting a lure for users seeking specific content. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, further supporting the malicious intent of redirecting users to potentially harmful sites.

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=civil+engineering+book+pdf+bangla In PDF document text
    • http://files.chanelyourthoughts.com/uploads/1/3/2/7/132740296/383191e8ad8cefd.pdfIn PDF document text
    • http://files.journeyfromjourneyto.com/uploads/1/3/1/4/131413550/267903.pdfIn PDF document text
    • http://files.theapostolicnet.org/uploads/1/3/1/0/131070872/0666ef3ef.pdfIn PDF document text
    • http://files.luskccart.com/uploads/1/3/1/4/131482950/9523935.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/1/0433/4845/9673/files/19812967367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/kurasidison.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/530012809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/harkins_southlake_town_center_14.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/xonibizixiwawom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/vepubivezixeradavejizoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/gabanudidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/jevuvuzile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9502/9915/files/xikel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/totijatixabu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA7 5200 bytes
SHA-256: 5b4cdd44bdb8d3cd48d0d06c79f6925c92ee68e14d65ae4c70b68b920210af83
font_01_sfnt_off00006e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E66 2116 bytes
SHA-256: 2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30
font_02_sfnt_off00007832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7832 14100 bytes
SHA-256: a83373bd904ddd2e60054c409bd7553689cef41c59e35a5be82c28b2bdc9dcfe

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