Malicious PDF — malware analysis report

Static analysis result for SHA-256 8353849ce0296446…

MALICIOUS

PDF

36.2 KB Created: 2020-08-28 12:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 49cec2bf1d4cee0abd1dca08b9287536 SHA-1: ff991b4c3d4762703d50c01fdc06fb3be35acbca SHA-256: 8353849ce0296446bb19f611ac4647c917c8507fc8c5c7cf05424f9717d2bdd3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, suggesting a phishing or scam attempt disguised as educational worksheets. The embedded URL 'https://ttraff.ru/pify?keyword=og+word+family+worksheets+for+kinder' is identified as a malicious redirector, likely leading to a phishing page or malware download. The ML classifier strongly indicates maliciousness.

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=og+word+family+worksheets+for+kinder In PDF document text
    • http://files.dimitraxidous.com/uploads/1/3/1/4/131454696/tepodem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0456/5244/3303/files/xuregoxilaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/puluwofozug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8024/5657/files/mivobus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/5421/8646/files/83991423289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/3317161375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6907/files/fabufarixodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0881/8333/files/27281491474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/83288516429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/97626673197.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 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4294 5396 bytes
SHA-256: c6440b486c320d9cb6e09088d8793f727dd69959fa4e90ce42c2d26d45c89d34
font_01_sfnt_off000054d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D6 9732 bytes
SHA-256: d7da1158c3c079f6d844e9f5e241e9dd02aebb7ac4174f7c9b1547f662a6ef3b
font_02_sfnt_off0000761e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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