Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9bca61798e9c18…

MALICIOUS

PDF

35.2 KB Created: 2020-08-27 23:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad38250a1df63947835a270cd2034760 SHA-1: 5b5888fdc1a2875582b1b12c5306752902b8c06d SHA-256: ec9bca61798e9c185b95d183193e5033f7144bfe508181299a75dc09b2eac187
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically a URL that appears to be a keyword-based redirector. The document body, though heavily obfuscated, contains text related to a '12 std biology book pdf in gujarati' and the malicious URL, suggesting a lure to trick users into downloading or accessing harmful content. The presence of numerous embedded links, many pointing to Shopify domains but ultimately leading to a malicious redirector, indicates a phishing or social engineering attempt.

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.me/pify?keyword=12+std+biology+book+pdf+in+gujarati In PDF document text
    • http://files.oregonoutbackadventures.com/uploads/1/3/2/6/132695568/ddee3e23aa.pdfIn PDF document text
    • http://files.mielapothecary.com/uploads/1/3/1/4/131407357/puriwirig.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/1/0433/0687/7080/files/vuketunaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/puvopezikawate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/relative_clause_quiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3156/0354/files/mariam_khan_reporting_live_star_plus_par.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/niserinesevifufipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/wilitufumopejazerezonap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/42913082451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/28669396322.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 4

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_off00004b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B33 5680 bytes
SHA-256: 2064988f13df5de7f5ce2f010c04924e0e43420aaf8f3826b7ebbc4aec3a2bdd
font_01_sfnt_off00005e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E97 9840 bytes
SHA-256: 351452e3ac0d65a733d3cdd710c40934fa6a22166e6c242e112e2f6185a00d3c

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