Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac2d1cf8898f54b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 04:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 621410780c4fc5a9e857e767b603b0a5 SHA-1: b6646a862beeff2f0e1354dd31e0f3d7e647e18c SHA-256: 3ac2d1cf8898f54bb894737b91a0e34719a327386580bcb4ef5010453eda4b5a
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, indicating a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=toefl+practice+test+pdf+vk'. The document body, though heavily obfuscated, contains text related to 'Toefl practice test pdf vk', suggesting a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

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.cc/pify?keyword=toefl+practice+test+pdf+vk In PDF document text
    • http://files.thebloodcrowstories.com/uploads/1/3/1/3/131383821/vukekeguriwemime.pdfIn PDF document text
    • http://tuvefej.thomas-webb-arts.com/uploads/1/3/1/3/131398064/lonowuraxerure.pdfIn PDF document text
    • http://talulom.nileshagemann.com/uploads/1/3/1/3/131398360/finegurobo-pokovomat.pdfIn PDF document text
    • http://tiluwami.plateauvalleyanimalhospital.com/uploads/1/3/0/9/130969627/b893b.pdfIn PDF document text
    • http://files.callanjames.co.nz/uploads/1/3/2/3/132302764/6b57c924ded.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/1/0432/6447/5299/files/gojoraputazutesajovekasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/9786/8712/files/58182517896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/6517375494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6861/1996/files/25929629531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/949986333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/7054776161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/88617294922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/9562/6662/files/tijaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/fisomigejo.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_off00005f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F65 5224 bytes
SHA-256: 9a2b96b5b7dc17f0fc2e9fb8908a5cbd7d8bdd5675e2a260d0db8a98cbcc15f0
font_01_sfnt_off0000713f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713F 11392 bytes
SHA-256: da18a932a0c7ac5426828e453fd6fc0a2d9967718ab6b6f0224288f0407090ba

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