Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ac326640a25fb4…

MALICIOUS

PDF

48.9 KB Created: 2020-09-18 06:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d9b7cb11d40433d38ac344c960a4312a SHA-1: 832b3d878e312ae3364e3202c7b99865c789fcc6 SHA-256: f7ac326640a25fb4751b08bed16b5263aabeb2e3005f04011a2733ec04a8e4f9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, suggesting the document's primary purpose is to distribute links, potentially for SEO manipulation or to lead users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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.link/wix?keyword=history+3+make+our+days+count+ao3 In 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/1/0431/5938/8320/files/80429854304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9652/9314/files/34761735406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/534517253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/59279212558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/65326233819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/93697398755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/84895412147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7206/0573/files/zakavafuzobiwex.pdfIn PDF document text
    • https://afbe54db-643f-44ac-9619-f034d99a220d.filesusr.com/ugd/1cc7e8_c08b8e7f98bf4b58a026ba22efd7a60d.pdf?index=trueIn PDF document text
    • https://40206508-7530-4f19-a35a-2dc4e72aec97.filesusr.com/ugd/89b1bc_7816ec9daaf9461fa0eee76be5b500ee.pdf?index=trueIn PDF document text
    • https://ea83dd9d-4f39-4fec-ae8f-c65034616ced.filesusr.com/ugd/2d1648_a0de6148ddd44373b643c67861fa62cf.pdf?index=trueIn PDF document text
    • https://19009227-0075-4c68-a212-e984f67ea548.filesusr.com/ugd/501a20_783c543bd8464e17b1baf8df808f85ce.pdf?index=trueIn 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 7

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_off000076b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B3 2984 bytes
SHA-256: 218615c96ca80467247facc766f9c2f2584948c92711c8aede41886f3cdaaaab
font_01_sfnt_off00008162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8162 5344 bytes
SHA-256: 7a89d972e119dacf6e614b3213ce27ae17c3020dc17cc7d78bd62b6e3a89df12
font_02_sfnt_off0000937a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937A 10236 bytes
SHA-256: 5be0030942bf159193a3896c95bcc0caa0e61dff75a12a7307ae7259911281b4

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