Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40b3c88f3fc2337…

MALICIOUS

PDF

48.9 KB Created: 2020-07-30 19:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd999b557af7b59b89ec2b6d2af0c786 SHA-1: b6dc88fc41be0619e4a3ff920909f191c4e4fb54 SHA-256: e40b3c88f3fc233748909eaa550d860a0ce3474d4ba1423672fccdfe9aba49b4
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru', which is likely the primary malicious payload delivery mechanism. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious redirector attack pattern.

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=carranza+s+clinical+periodontology+9th+edition+pdf In PDF document text
    • http://files.deanagrenier.com/uploads/1/3/0/7/130776423/7644917.pdfIn PDF document text
    • http://files.northcentralcivitans.org/uploads/1/3/0/7/130740062/mobuwibupanuwem_lurobeperum_gixotakuxedi_xajuzagelekegit.pdfIn PDF document text
    • http://files.jonathantsao.com/uploads/1/3/1/1/131164452/3927805.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/1/0428/9835/8432/files/28391359898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7021/6597/files/basarulimufeluzozajulor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/poxaxasuvijuxojadusubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/verenepaduse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/39512103097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3419/8684/files/bejutudifodokawaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/pozajemalejazikifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/79860801226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2688/9369/files/natomoxexebozuletivuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/badudavofokasavexojosenug.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

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
stream_007_off00009248.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9248 21168 bytes
SHA-256: f2d4269fc7184fdcc0682c2de40dfe021455e6c3caefe3067448808a9390b1e3
font_00_sfnt_off00005aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAD 5536 bytes
SHA-256: 93522b279f88af7dbeefffd09bf86a5be6cf57aa60ac842ee9e33a7ea9932860
font_01_sfnt_off00006d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D87 10884 bytes
SHA-256: d3e54e67aaff608345fd8598fbf0666d867916801274dff12695b6f264c94736

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