Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b71f004a078c4ea…

MALICIOUS

PDF

42.9 KB Created: 2020-07-27 21:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ac3b8e701571f0b4f5b0a80d6e1f156 SHA-1: 28f351cbdfdef8cf738a07bc05039585ccf04c04 SHA-256: 9b71f004a078c4eabbb9f600a0169bf83a79792ef8fcb72d151b172ee8aa374d
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being 'cdn.shopify.com/s/files/1/0429/1434/9219/files/nivuxigo.pdf'. The document body, though heavily obfuscated, suggests a lure related to 'converting fractions to decimals worksheet answer key', intended to trick the user into clicking the malicious link.

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=converting+fractions+to+decimals+worksheet+answer+key In PDF document text
    • http://files.ellen-rose.co.uk/uploads/1/3/1/3/131381363/moxonepekizason_tobirirof_vubino_kiwuvikuw.pdfIn PDF document text
    • http://files.seasidejewellery.com/uploads/1/3/2/7/132712315/7998453.pdfIn PDF document text
    • http://files.matthewmixes.com/uploads/1/3/1/4/131437956/sivoru.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/1/0429/1434/9219/files/nivuxigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/51913698046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/8338809742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/84078547466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9111/6700/files/kimiwupirisanex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/18694154560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6045/3791/files/kexuditofonomagivamefip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2564/4192/files/63129964485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/kutoxixavemiluvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2174/3781/files/gonagovupejegajorujozi.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_off0000683e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683E 5564 bytes
SHA-256: a5bdf082643d27f7b66bdcb7aeb1527280b221d4f321d7b03fcc2852001e3999
font_01_sfnt_off00007b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1C 10212 bytes
SHA-256: 938b350f564ddb2087183ee9934fcfde8b52954a0200d7cc444448d12c70eb5a

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