Malicious PDF — malware analysis report

Static analysis result for SHA-256 f766a22427be8aa4…

MALICIOUS

PDF

40.8 KB Created: 2020-08-15 06:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5fd21971f49edc46fd3daf390727d1c SHA-1: e8b5ad1d10391a2c9709cd4d58ee99e77a1d25f2 SHA-256: f766a22427be8aa4fb162d6313725b9a6d786ff50fe49a1c0e542cf654110761
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=letter+d+worksheet. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to external malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=letter+d+worksheet In PDF document text
    • http://files.fortbraggalleywayart.org/uploads/1/3/1/4/131453354/6317129.pdfIn PDF document text
    • http://mitaditix.seniorvolunteersd.org/uploads/1/3/1/6/131607305/6433073.pdfIn PDF document text
    • http://files.earth-protect.org/uploads/1/3/1/0/131070866/lefoz.pdfIn PDF document text
    • http://files.meta-future.org/uploads/1/3/0/7/130775017/vetumitimopoz.pdfIn PDF document text
    • http://files.thejesusconversation.org/uploads/1/3/1/8/131856195/2ab05a68ff.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/1/0431/4071/0566/files/83233999433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4093/0968/files/65717603272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/zetenemexizepumafejotix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/apathy_evaluation_scale_informant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/jelos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/betigimebozomakalojusafoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9340/1501/files/zujefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/vumozug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/vifatobevefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/76722332257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3672/0808/files/25996479625.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 4

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_off000062a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A2 4768 bytes
SHA-256: 359a34b68c5f56780bfb13628b0fba0fc16418e87082d9b136a044a33fba0c51
font_01_sfnt_off000072ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EA 10412 bytes
SHA-256: 3ead2f775c43ffbe051b8b3ded0c022c3ea505581b1228a722e8511b4c4a1607

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