Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb236db6e9880220…

MALICIOUS

PDF

44.3 KB Created: 2020-08-25 00:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d0b51ac82d8fb442f04d2a938234f43 SHA-1: 2e52513ab97f01c13a86368762e788f6925f7d9d SHA-256: bb236db6e98802204726f9f4681eacd5f93d699ca08f2625051cf62ddcbb7f76
194 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with a large number of external PDF links, many hosted on cdn.shopify.com. The primary malicious URL identified is https://ttraff.ru/pify?keyword=acknowledgements+example+for+report. No scripts were extracted, and the document body is heavily obfuscated, but the presence of numerous links points to a likely SEO manipulation or redirection attack.

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=acknowledgements+example+for+report In PDF document text
    • http://nupon.wolittlesr.com/uploads/1/3/0/7/130775503/vowerobodiletex.pdfIn PDF document text
    • http://files.ciemmaus.net/uploads/1/3/1/8/131856602/nubir_maroxazakigive_pasewo.pdfIn PDF document text
    • http://files.wfut.org/uploads/1/3/1/3/131398560/jireguviranosek.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/1/0433/9807/0426/files/bahasa_arab_amiyah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7937/7572/files/4031324292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/xalupaduxod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/simple_sql_queries_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/46465925939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1240/2839/files/bagatelle_pour_un_massacre_celine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8044/0213/files/64051628806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9607/0549/files/zujeborede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/73789705833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/soxefowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/bernoulli_s_equation_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3751/4133/files/pelican_rock_walkthrough.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_off00006f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 5688 bytes
SHA-256: 44ce7787f184866d3ea815435ad367a5b74cca8d6fd7d5d86459d1e41bc389b6
font_01_sfnt_off000082bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BC 9872 bytes
SHA-256: f884d5636cee25b04ab9bcd8c799d6dc221c6c6b097a2ad2d33bbd0b043eb4ad

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