Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91e9b817e76de80…

MALICIOUS

PDF

45.3 KB Created: 2020-08-12 18:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7bb40e7fec2ab8ba61d77a4e10e5e826 SHA-1: 16e93a69961408194adc1717016249db6a06b4b2 SHA-256: f91e9b817e76de80d28552efdbd0c69d232fa5276ec0a0a74d134acc39dcb41f
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, while garbled, contains the string 'Bronchite virale pdf' which is also present in the malicious URL, suggesting a lure to download a malicious file disguised as a medical document. The primary attack vector is the embedded malicious URL designed to redirect the user to harmful 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.cc/pify?keyword=bronchite+virale+pdf In PDF document text
    • http://files.twocentcomics.com/uploads/1/3/1/4/131406537/golagufarumopu-kajir-xopesowujuwa-bolurobizuno.pdfIn PDF document text
    • http://files.austincleek.com/uploads/1/3/1/4/131409309/gasufetipug-kilun-mujigofe.pdfIn PDF document text
    • http://bijumoki.plugincitizen.com/uploads/1/3/0/7/130738943/tunaxufiw-pekojinosozupa-nalesafi-zumevopu.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/1/0430/8107/2789/files/sumezapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5563/6889/files/fisiopatologia_del_asma_bronquial_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/74187848753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/biological_classification_pogil_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/87342652247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/32845576742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5572/4197/files/cp_snow_two_cultures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/refesipumalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/20915249160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9059/2422/files/tufavomoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/tibifaburumekujotewunija.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 1

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_off00007345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7345 5172 bytes
SHA-256: c27fcd4734cea76827330a9e03b992930eca7b27aaebd2232abb3e2fe730d982
font_01_sfnt_off000084d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D7 10568 bytes
SHA-256: ea812576a0c2fc335fd5310c6f5144cf6570d7fda22a244daf1249aa8b5b3f88

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