Malicious PDF — malware analysis report

Static analysis result for SHA-256 259a85559464cd34…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 23:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 990a3ca91b20f0b4a042933875ce0a6c SHA-1: a388eed9a8a0d2fdc2ebb4bb8642f97a41d4513b SHA-256: 259a85559464cd340947fc5e79a903d6101b95f781220399cc80464cdfcda2c4
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 PDF files, a technique often used for SEO manipulation or to obscure malicious destinations. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=lcm+and+gcf+worksheets+for+4th+grade'. The document body, though partially corrupted, contains text related to 'lcm and gcf worksheets for 4th grade', suggesting a lure to disguise the malicious link farm.

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=lcm+and+gcf+worksheets+for+4th+grade In PDF document text
    • http://files.nowloadingnews.com/uploads/1/3/1/6/131606636/zozafopip.pdfIn PDF document text
    • http://files.oneburgh.com/uploads/1/3/0/7/130775180/lesonilaxalejupa.pdfIn PDF document text
    • http://files.juliemartincounseling.com/uploads/1/3/2/8/132816202/3593556.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/1/0435/2756/9576/files/53856884441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/radufezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0254/3778/files/daxudanikatisavasunegul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6163/1389/files/25392136836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/jagidota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/vimesekonek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/giterenodaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/keviban.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/21399135209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/digital_design_morris_mano_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/1480/2855/files/mariadb_for_windows.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 6

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_off000060ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 5588 bytes
SHA-256: 546a80722c2fc01eb260c9b592224f54b064a54594f484ca8888ec8a3eb8b9ef
font_01_sfnt_off000073a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A0 10040 bytes
SHA-256: 4b871f3b63adffc3365f6280b3bbf3d69403d9ca72cf48525121ebcdae7d8194

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