Malicious PDF — malware analysis report

Static analysis result for SHA-256 decc0eebf01469d5…

MALICIOUS

PDF

42.4 KB Created: 2020-08-03 12:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 63155452be2b942417bffcff58dd6118 SHA-1: 4acbe9d7806a3154ce799d505ac022650fc7bb98 SHA-256: decc0eebf01469d5949fd58bddb2609be6989f03b9bb9302e24eb7314eb3c94c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains the URL that triggered this heuristic. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely for SEO manipulation or to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which is designed to lead the user to further 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=data+structures+and+algorithms+with+javascript+o+reilly+pdf In PDF document text
    • http://files.sandlotdublin.com/uploads/1/3/1/3/131381722/ae228a5382.pdfIn PDF document text
    • http://files.cbcareermanagement.com/uploads/1/3/0/9/130969306/xojupopek.pdfIn PDF document text
    • http://files.birdsontheniagara.org/uploads/1/3/1/4/131453028/firivokesaxamax.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/1/0437/6756/2391/files/66717702810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/92436378840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/vaxofanapiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/borderlands_2_ps3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0587/8170/files/kijejuvawitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/susefijulejinubajires.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/54537807318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/statistics_mcclave_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/xelekevikenuvove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/raxulegafilamokikogomun.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 2

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_off000057d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D8 5780 bytes
SHA-256: a21213d0d156b5f63bc7d936cf1c1d2951185ecffd478a6698c7e673a349a97f
font_01_sfnt_off00006b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B73 10168 bytes
SHA-256: 1bc94af8ea0ee19923e70cdecfb4d8db9c16c8132098e985a07cf39d4298fda8
font_02_sfnt_off00008e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E43 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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