Malicious PDF — malware analysis report

Static analysis result for SHA-256 63881ca4bba24523…

MALICIOUS

PDF

39.9 KB Created: 2020-08-15 22:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f36def71587dd7e518e0fc492fe49e7 SHA-1: f9f0eee68aff520175003b14d39e44be13e64449 SHA-256: 63881ca4bba24523e9e7ec615cbb985a2ac21d97485c599ddff43c3350eff9e2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though partially obfuscated, contains text suggesting a lure for a 'free version' of content, aligning with phishing or scam tactics. The presence of numerous external PDF links further supports the 'SEO link farm' heuristic, indicating a likely attempt to drive traffic to malicious 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=carnivores+ice+age+latest+version+free In PDF document text
    • http://files.skateyogi.com/uploads/1/3/0/8/130813757/damewizuw.pdfIn PDF document text
    • http://files.overlandcruisersmt.com/uploads/1/3/1/4/131406701/suwote_nozoxaj_rekigezawerejep.pdfIn PDF document text
    • http://files.namibiatourism.info/uploads/1/3/1/4/131407647/megemogu.pdfIn PDF document text
    • http://files.literallyanythingmovies.com/uploads/1/3/1/4/131437601/6fa45202a48f3b.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/1/0428/9835/8432/files/32377204601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/starcraft_mass_recall.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9081/8712/files/vebukegebavijoluxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/kefamojadisakoguxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8063/8879/files/introduction_to_abnormal_child_and_adolescent_psychology_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6140/files/online_editor_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/pesuzevajuku.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_off00005dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBA 5012 bytes
SHA-256: 2d4c584b459c230106642ce83c06e6ce1343e9d02a54890a77aacede32e69f77
font_01_sfnt_off00006ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE3 10416 bytes
SHA-256: 096b580ab9124ae5d8c3ca465cee13e3b4e623bd48170397e8be8daccd16755a

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