Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a440248d6d8b02d…

MALICIOUS

PDF

45.3 KB Created: 2020-08-03 12:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d1bcb65eb6a5f6d2378c2a87bd4d08b SHA-1: cda7027f185a6237b1852ec3030fa0f7168bae41 SHA-256: 4a440248d6d8b02d4f9d4bb515ed3647fad8f4e61dfd2a9217d8438e14a91efb
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, identified as a PDF SEO link farm. One of these links, https://ttraff.com/pify?keyword=riesgo+inherente+pdf, is flagged as a malicious redirector. The document body is heavily obfuscated but contains references to the redirector URL and other benign-looking Shopify URLs, suggesting a lure to a malicious site. 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.com/pify?keyword=riesgo+inherente+pdf In PDF document text
    • http://files.asifthinkingmatters.com/uploads/1/3/0/7/130739232/f6af3cbea988b.pdfIn PDF document text
    • http://files.1000menempowermentgroup.com/uploads/1/3/1/4/131437276/17df95.pdfIn PDF document text
    • http://files.littleseedcounseling.com/uploads/1/3/1/6/131636890/moremotibatasi.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/1/0430/1229/2767/files/tegugixororevifemidelavel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/32660718951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/53130129131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/1442725638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/dragon_fang_pixelmon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/tarosizonazugur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7552/5022/files/94320429398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5748/6753/files/maytag_neptune_dryer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2102/3904/files/book_of_exalted_deeds_3._5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/banen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/60729332395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/livekeg.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 7

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_off000070c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 5068 bytes
SHA-256: 381c1831df255171f262b7f4edb9ee020466c5a4398f2839d6df497780e9e7d2
font_01_sfnt_off00008205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8205 11332 bytes
SHA-256: 5c5addd7e5b597fef73162b74b615f75b7f9f85497d7098b6764933b2a474ad5

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