Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a8e9f2cbd99922…

MALICIOUS

PDF

58.3 KB Created: 2020-08-15 19:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f4b63afd69954eabdec122b05d9b9c6 SHA-1: f57637375fc7fc5a87037eb30132463b58a79d7a SHA-256: 37a8e9f2cbd9992236f411a9784991de02fdb1eed84173896a6ad30fa0db1dbe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'Reglamento de insumos para la salud vigente pdf' and includes a URL pointing to a malicious redirector. This suggests the PDF is designed to trick users into clicking malicious links, likely for phishing or to download further malware.

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/wb?keyword=reglamento%20de%20insumos%20para%20la%20salud%20vigente%20pdf In PDF document text
    • http://fowujez.eliebaking.com/uploads/1/3/1/3/131383478/juxarabaga.pdfIn PDF document text
    • http://zusisok.jeromebibleartmuseum.com/uploads/1/3/0/7/130740178/8650771.pdfIn PDF document text
    • http://files.suzukimusicwinnipeg.com/uploads/1/3/1/3/131398547/9f6f62.pdfIn PDF document text
    • http://files.mackatak.net/uploads/1/3/0/7/130740521/4093272.pdfIn PDF document text
    • http://files.zmagazine.co/uploads/1/3/2/6/132695602/debot.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/1/0430/6662/2105/files/detidutiwagunifukogizeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/62113185684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/lopiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/wirurevozepaxiditug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/lujegisos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/rabin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/58029122597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1091/4466/files/altivar_11_instrukcja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/census_2020_mp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/12589090614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/blood_hunter_order_of_the_lycan.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 8

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_off0000a260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA260 5428 bytes
SHA-256: 2685c80e2c9c92c2d2df4b076767924b06690104111e80c37ccafec9979ec6e1
font_01_sfnt_off0000b4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D3 11472 bytes
SHA-256: a6b61046686ebfeb1594d6c1bc662170987cc7993fdf2d717b828466fe217261

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