Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d2232d1860b620…

MALICIOUS

PDF

37.9 KB Created: 2020-08-03 15:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6496c5d7ddbc588af52b4cec7cf07bbc SHA-1: 566faaf90f41983cd9dde834f7dcbf14e6550ea4 SHA-256: a5d2232d1860b6207cb2168317caa76ac81008adabea05c6486bb23e7df06ed4
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector. The document body and embedded URLs confirm this, with a primary URL pointing to a redirector service. This suggests the document's purpose is to lure users to malicious infrastructure, likely for phishing or malware delivery.

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=libro+ciencia+de+los+materiales+dentales+phillips+pdf In PDF document text
    • http://files.lifeofpen.com/uploads/1/3/1/4/131437074/kumijogoz-xabijaxep-pigexutulifar-lediwefoburosok.pdfIn PDF document text
    • http://files.istudentsduke.org/uploads/1/3/0/8/130873810/barijemebar_pavozuroput_bojibi_forupusasupinul.pdfIn PDF document text
    • http://files.fabricsatfleetwood.com/uploads/1/3/0/8/130814923/38beb8.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/1/0430/8644/6746/files/16256492395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/10217319349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/9090740429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/avr_sleep._h.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8069/4437/files/6887978325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/sapadorapuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/simowilirukovawuweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/47558942281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/10586674440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7074/9856/files/mitususapunipefoxukujepuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/git_restore_deleted_branch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/adaptability_dark_souls_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8103/9013/files/sozewunem.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_off00005491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5491 5476 bytes
SHA-256: fd31749c3085a765c6b10377857761bec032c671a15a9d49320e06761c7a2fd8
font_01_sfnt_off00006706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 10192 bytes
SHA-256: 57d106216341e9045dc6acb0adf4a57fea188c22daa05f096f7a33d2410af521

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