Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7cc658cd2edaec…

MALICIOUS

PDF

34.0 KB Created: 2020-08-19 09:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 897be1c7501c0f2170da47e4676c98b1 SHA-1: 098472bb1598420b5b4b47fa035cc62c5b393508 SHA-256: 1c7cc658cd2edaec625c0dec44f5afe1afc2b7831bc365872b29a6009a411ced
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content, specifically "Neonatal resuscitation course test answers". The primary link, https://ttraff.ru/pify?keyword=neonatal+resuscitation+course+test+answers, is a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous links to PDF files hosted on various domains, including Shopify, indicates a coordinated effort to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted from this sample.

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=neonatal+resuscitation+course+test+answers In PDF document text
    • http://files.voiceofourangels.com/uploads/1/3/1/3/131379860/61cb48de35d8.pdfIn PDF document text
    • http://files.pamelagossett.com/uploads/1/3/0/7/130776757/1591499.pdfIn PDF document text
    • http://files.thedomainhobart.com/uploads/1/3/2/6/132681611/lisodakuxixasaruw.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/1/0430/1219/4463/files/96294551088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/64535741766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakawefefaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/dymo_labelwriter_400_turbo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2922/8702/files/79025232427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/woxufopagutukol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/angularjs_reader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/zalawamubefolavanunewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6207/4261/files/51338466442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2838/5690/files/jonabitozoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/75457822057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0210/0899/files/24912055435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4335/6821/files/xodidut.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_off00004743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4743 4856 bytes
SHA-256: 8cdf401a49534d573a6e70cc07f529575761aad2790bee6aae1603f1522910ad
font_01_sfnt_off000057e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57E3 10204 bytes
SHA-256: ba2c0d9b95d3a17b10113a0c8c156d0b4c43ec0a725611bc43ec6549e672d37c

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