Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d9e3ba0cd6bff1…

MALICIOUS

PDF

46.9 KB Created: 2020-08-04 01:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 777b5e92f1006eb49650f558e5b0548d SHA-1: 786e1b1c400a5e5b2277b5206f7d742b7cb612fc SHA-256: 76d9e3ba0cd6bff1bc237f5c8023962575610776235767e21e0f00261091329e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, `https://ttraff.com/pify?keyword=cathode+ray+oscilloscope+pdf+free+download`, which is designed to lead users to download other PDF files. This is indicative of a link farm or SEO poisoning attack, likely intended to distribute malicious content or phish for information. The ML classifier strongly supports the malicious nature of this PDF.

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=cathode+ray+oscilloscope+pdf+free+download In PDF document text
    • http://files.acweinschenk.net/uploads/1/3/0/7/130775108/zurelaxakikakuk.pdfIn PDF document text
    • http://redusoten.dignitywomenscenter.com/uploads/1/3/0/7/130739625/kinojewan_varijamenanikol.pdfIn PDF document text
    • http://files.achirohealth.com/uploads/1/3/1/1/131163540/kigavinezenefenolar.pdfIn PDF document text
    • http://files.crystelbeckerphoto.com/uploads/1/3/1/1/131164112/3cabe7.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/1/0434/8300/5093/files/91010930750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/94939963197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/dexuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/84858028264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/99554040700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/vawimew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/algorithm_design_kleinberg_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/82171466637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4032/files/68948437347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4591/1709/files/76242693449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/76048986811.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 6

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_off0000795f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795F 5344 bytes
SHA-256: 9635d12a91b7bd5cad916817d5b1f8e4a53b403a40895108693d66ea10ce25d9
font_01_sfnt_off00008b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9C 10304 bytes
SHA-256: 9013e46734d4ac8a31f0ec4ec5a7975ca939ae4d6db935bd59615770ecb485b2

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