Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17211394bbddc03…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 05:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fcbbdd7adece070d3f0f88742af563b6 SHA-1: e65f18930dc32caa0261e47bde344f46e90be041 SHA-256: b17211394bbddc03cf1eefd87d0da6e66304a9e9a5eda44e389576933f86bf1b
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'flexfit caps size guide'. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many of which are hosted on Shopify but point to potentially malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious verdict.

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=flexfit+caps+size+guide In PDF document text
    • http://files.facundomenendez.com/uploads/1/3/1/4/131453005/bogepilivefewetos.pdfIn PDF document text
    • http://zibubi.edandclaudiaroadtrip.com/uploads/1/3/1/3/131383791/9160984.pdfIn PDF document text
    • http://files.heathermcclarriephotography.com/uploads/1/3/2/7/132740281/xavumolida.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/1/0430/7078/3645/files/abide_with_me_guitar_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7334/6463/files/wadiveru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/fixug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/97711064570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6085/3920/files/torin_black_jack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0441/2583/files/accounting_system_implementation_plan_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/bridget_jones_the_edge_of_reason_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9809/6284/files/whatsapp_app_by_play_store.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0177/9100/files/jusedekolopow.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 5300 bytes
SHA-256: d7a72d81ecfa368fbb6d7a9f979a897a07a9c1e38092a4d02bf1f8bc8998717a
font_01_sfnt_off00007672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7672 10156 bytes
SHA-256: f5b0cfced33c101262d17b16f2e5ca98e08b69731e7aaecb47005af0ffae8df4

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