Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1920794bff40228…

MALICIOUS

PDF

41.4 KB Created: 2020-08-21 08:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e1b52f20014c3b1539a7d47377f94f7 SHA-1: eb33cc1be3615d135bed385891ac95424480fce8 SHA-256: f1920794bff40228c78c7ab4fc2ec64c29a2f338843422a0bf0fc387241909a4
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body contains text related to 'finger whistle sound effect' and the authoring application is wkhtmltopdf, suggesting a potential SEO spam or phishing lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=finger+whistle+sound+effect In PDF document text
    • http://files.heathervillari.com/uploads/1/3/0/7/130776433/mazaxipawapimit.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/1/0431/7085/7122/files/wibaselirimowivuvexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/12562027373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42262915950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/69635681225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/59373718109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/lagegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/53934694894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8301/4048/files/12895458072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/reroxaniw.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 2

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_off00005145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5145 5004 bytes
SHA-256: 481bd24a4cde36ffbe103e737423a4451b826635f52bba91b1a603737d8bc106
font_01_sfnt_off00006252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 12948 bytes
SHA-256: 412123c212358ceeabfa9ce0772b570010dbba759709af964a6f9d1cad0d7e19
font_02_sfnt_off00008b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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