Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c90576e13a96708…

MALICIOUS

PDF

41.9 KB Created: 2020-08-02 10:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 19ff463a956c969daf36ad4bbf7c7dbc SHA-1: 7c7a9b162b656c14eb83e3db962a0b6a3bfec5d2 SHA-256: 9c90576e13a967081dc49d65af2f272f395215551a0b0ce4521a7ddf74789faf
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body, though partially corrupted, contains the same URL, suggesting a lure to a malicious site. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged for containing a link farm.

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=how+to+find+angle+between+two+vectors In PDF document text
    • http://files.aquazircon.com/uploads/1/3/2/6/132680990/f877514862.pdfIn PDF document text
    • http://files.thekellyjaye.com/uploads/1/3/0/7/130738814/0ed22f99ba7d3a4.pdfIn PDF document text
    • http://files.draysonquarterbackacademy.com/uploads/1/3/1/4/131482915/felilon.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/1/0428/4301/3287/files/99774791463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/zatofif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7228/9944/files/52203668651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5053/9940/files/fagofaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/88835335809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/vafife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/pagitilawujatubafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/nunagamerisube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1124/3162/files/rubojerizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6496/5782/files/32851452758.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 3

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_off00004c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8E 5228 bytes
SHA-256: 9530685a66043e113bdbb45e235fe4da07fd251a383ed5e5b01a02dc2136e14c
font_01_sfnt_off00005e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E79 14488 bytes
SHA-256: 76c0cc42ff01e9d111c0c36afa3a00c48e76f8f77861376a26936111111675eb
font_02_sfnt_off00008c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C96 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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