Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb62b63105bd1967…

MALICIOUS

PDF

62.6 KB Created: 2020-07-30 17:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1c89c04d6617092afd6222b4f701fd9 SHA-1: 3c8cae92e0f65cb3d59f211cbfe22301f643895c SHA-256: cb62b63105bd19677691a770dc2044600a8404c74c3bfc0cba7d268ee30c7b3e
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying a 'PDF links to known malicious redirector infrastructure'. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or phish users through a large volume of outbound links.

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=fasciola+hepatica+pdf In PDF document text
    • http://files.wellesleyhistory.org/uploads/1/3/2/6/132680986/4652867.pdfIn PDF document text
    • http://files.tributegiftsgp.com/uploads/1/3/1/4/131437149/kovalaxewubipizenete.pdfIn PDF document text
    • http://files.moombaparkps.vic.edu.au/uploads/1/3/0/7/130775373/c5743df461ee.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/1/0431/1416/8487/files/33430327574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/rojamuforusasopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/famela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/bowafofogazexuwamorodojar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/zolasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/34590497718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/zizonasesuregopodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/zejufeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/koraxomebediz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/40361897731.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_off0000ba29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA29 4784 bytes
SHA-256: 786eec14755c60306f34e699ed06a063b66ef0d6baf440ca2e7307b4ee0bf3d3
font_01_sfnt_off0000ca75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA75 10260 bytes
SHA-256: 715719a7b980a6b50cd5c4090e634ce41faa3dbe5353be97fbd7a5161c9fcb23

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