Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf22a0bf65ec30e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-23 03:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: de07a55d2c5c46027084c693cc489a15 SHA-1: fe916596731646271520899e8c2690a8ed5672e8 SHA-256: daf22a0bf65ec30ed2e63dfbd395498db676d4910c5fe3fcd834b5317f547cb3
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary link directing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely intended for SEO manipulation or to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the extensive link farm and redirector presence are sufficient indicators of malicious intent.

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=microorganismos+coliformes+definicion In PDF document text
    • http://files.lisaholisticbathandbody.com/uploads/1/3/2/7/132712093/6088978.pdfIn PDF document text
    • http://files.harmonysong.co.uk/uploads/1/3/1/3/131383838/7b8e7725f.pdfIn PDF document text
    • http://files.creatingthespaces.ca/uploads/1/3/1/6/131637362/nodibagifalabetabag.pdfIn PDF document text
    • http://setonasuj.sojeonglee.com/uploads/1/3/2/3/132302782/sepig.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/1/0430/7956/5465/files/xamagadanujos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/bssc_notification_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2430/2759/files/32158641958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3066/5637/files/90115382706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/akuntansi_keuangan_lanjutan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/velapulumumobokegobem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/16809888657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/warewipeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/82794736648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/rutefibumesajutexid.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 5

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_off000063ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EA 5344 bytes
SHA-256: ebab0d7b736f8506e7e291669f75a4cb83eb44b038ed23ff2102e1e7fc6e2c46
font_01_sfnt_off000075fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FE 10304 bytes
SHA-256: d4162be25a16643b2cb86b409dd34fcba0ce26ace8ea5ae7fbd58885c247789a

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