Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e74f3142c6ecb2…

MALICIOUS

PDF

32.4 KB Created: 2020-08-14 02:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a530bd50176f1be20c744aa9c4f14e5d SHA-1: 1f5f6d7d51b4a97990f36f368a875018f64eee2c SHA-256: f2e74f3142c6ecb2a49366026ab073efd5b11d8d8943aaee14753453bab11d05
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used to obscure malicious intent. One critical heuristic firing indicates a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=connectors+english+grammar+worksheets', which is also flagged as a malicious redirector. This suggests the document's primary purpose is to redirect the user to malicious infrastructure.

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=connectors+english+grammar+worksheets In PDF document text
    • http://vawibu.familyhistoryguy.net/uploads/1/3/0/8/130874493/3741528.pdfIn PDF document text
    • http://files.rebeccalynnphotography.net/uploads/1/3/0/8/130874518/4840188.pdfIn PDF document text
    • http://files.fexasas.com/uploads/1/3/1/4/131407281/tizomiletofepuxekan.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/1/0431/8517/6736/files/67373299114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/introduction_to_nanomaterials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/putowofubelonexokafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1379/0106/files/the_complete_contest_prep_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/gen_brca1_y_brca2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7230/4805/files/how_to_stop_avast_email_signature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/sovenodogibefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/44084386632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/kikeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7036/4571/files/calculus_textbook_larson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5941/9038/files/87736863617.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_off00004308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4308 5272 bytes
SHA-256: 0da765b39a14302102bbafff496d4d076a1a9ae08797c3f9df113e8fbf7e8d10
font_01_sfnt_off000054d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D5 9344 bytes
SHA-256: e374bd4e3c6b73805dc709e6b517d6b159cbbf41027fa333bc46d5a322885006

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