Malicious PDF — malware analysis report

Static analysis result for SHA-256 581ecef35fcac1cf…

MALICIOUS

PDF

38.3 KB Created: 2020-08-21 02:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15c67b79766dc2e7aadc5a6886a03df4 SHA-1: b3051d6263685858fe6488f0ea6bf9c70c1295ec SHA-256: 581ecef35fcac1cf4c8e3c46f2f0ba6afd37f76c366738944ed3b227dbbaec28
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body, though obfuscated, contains text suggesting a lure for 'Macmillan grammar worksheets pdf', and the presence of multiple embedded URLs supports the finding of a link farm. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt to redirect users to potentially harmful content.

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.com/pify?keyword=macmillan+grammar+worksheets+pdf In PDF document text
    • http://files.redmountaincommunity.com/uploads/1/3/0/7/130775784/sefenefamon_mapabuxodaja.pdfIn PDF document text
    • http://files.palmspringsappliancerepairpro.com/uploads/1/3/0/7/130775232/93c26684.pdfIn PDF document text
    • http://loxuro.blueridgeapiaries.com/uploads/1/3/1/8/131857101/rubajif.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/1/0434/4774/6721/files/87466292481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/mededuvujosozazuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7197/9171/files/monteith_s_crushed_apple_cider_nutritional_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/98693892540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/76822073900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/48954572594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/clinical_research_associate_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/bafuwujofalufarogevomadib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/83647574440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/pdf_to_word_converter_download_software_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/gadonuzapemazubun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/relitixudapunuliginuvero.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 1

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_off00005532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5532 5728 bytes
SHA-256: 56ed1449ccbd55cb3fcfc33a53e58aaa856c971fc0448bff96a3e26b6ac5681d
font_01_sfnt_off0000689f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689F 10600 bytes
SHA-256: 40e6308d073b236492fe3d0c61ee33f69a1e7ecd7859803603e19a607f35fa99

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