Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e76278a6d790a5…

MALICIOUS

PDF

49.4 KB Created: 2020-08-20 23:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f79ba129261e94afadc4c6a05e3f801 SHA-1: 1b7a51ac4c1bbfd90334a60ba742cea9b5e8a932 SHA-256: a5e76278a6d790a5c0e0a351e38a96a28710415ae89699f313283bce9840e524
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link pointing to known malicious infrastructure. Additionally, it contains a large number of external PDF links, characteristic of a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=square+book+mockup+template, which is likely used to lure victims into downloading 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.ru/pify?keyword=square+book+mockup+template In PDF document text
    • http://files.artmatterscommunitystudiogallery.com/uploads/1/3/1/0/131070674/038f8ab324a85d.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/1/0434/4214/3397/files/reason_10_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/artificial_intelligence_and_machine_learning_fundamentals_zsolt_nagy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5662/7866/files/tozalasuzesezax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/lujoxozosatulosugewodaman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0984/5911/files/black_spiderman_hd_wallpaper_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/32973085000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/23360335110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/gutachtenstil_zivilrecht.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1246/4535/files/plant_systematics_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6912/6309/files/susaforu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/iap_vaccination_schedule_2020.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 5

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_off0000851c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x851C 5332 bytes
SHA-256: ae51a667c885888fb473230cea9ca968d6b8f496fb2a0f33e99bd7d6d818215e
font_01_sfnt_off00009729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9729 9832 bytes
SHA-256: 443c18773e363e907c3f43add0301ac55761a115a968bff7f564accf4fb51386

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