Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca0bc0a9d638e9f…

MALICIOUS

PDF

39.2 KB Created: 2020-08-11 00:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a95698e2bec5d49a0f3a06c86ab18c4 SHA-1: 2cb3d1d8233ace4b7e406a162659f61b3d657ed5 SHA-256: cca0bc0a9d638e9fba75076c9ad35580da7bbe064c7dc8622bfd010336abb26a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=absceso+pulmonar+pediatrica+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify but point to potentially malicious content. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to ascertain the exact nature of the payload beyond the redirection attempt.

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=absceso+pulmonar+pediatrica+pdf In PDF document text
    • http://gesogita.zoetrodd.com/uploads/1/3/0/8/130874601/6a39c3516c4a028.pdfIn PDF document text
    • http://files.ltlfitness.net/uploads/1/3/0/7/130775735/0910086e.pdfIn PDF document text
    • http://zivaridis.cconsultingsa.com/uploads/1/3/0/7/130739379/porixep.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/1/0428/9154/2681/files/19075726489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/61143227338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/lugadazos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/kabajodaratezek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/21729578109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/26472402002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/29284301613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4380/7654/files/tumaczenie_zda_angielski_gimnazjum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9046/0324/files/canchalagua_propiedades.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/logavuxuzebiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/91989569385.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_off00005996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 5432 bytes
SHA-256: 87528d4585c7c8873f96c98d26b454044136fd5bcde99186937a71a19840afe4
font_01_sfnt_off00006be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 10652 bytes
SHA-256: 3c1e915a4193babc9091f282a29ad4710ae23221e53121d8a6614aa0f0344d76

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