Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6f667de118ed8e…

MALICIOUS

PDF

175.4 KB Created: 2020-09-16 19:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 042a9251ad16de5f8932dacba12fba68 SHA-1: 098ad2faac0fc8d017c86901c25866059d980e22 SHA-256: 4d6f667de118ed8e53069444bcc95ece9bdc204d51522b895f5d924d8ff052aa
134 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Life science chapter 4 study guide answers' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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/wix?keyword=life+science+chapter+4+study+guide+answers In PDF document text
    • http://files.primaryds.com/uploads/1/3/0/8/130873927/e1b3787f.pdfIn PDF document text
    • http://rubatiji.dunegrasscreations.com/uploads/1/3/1/3/131379373/1324117.pdfIn PDF document text
    • http://zanisud.nicoleuphotos.com/uploads/1/3/1/0/131070109/zinutika.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/wetebumem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/wotemopusokurozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/27159313015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/ancient_greek_pronunciation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4732/9702/files/athlean_x_training_camp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/4856951730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/2008_saturn_aura_xe_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/intermolecular_dipole-_dipole_forces_yahoo_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0412/4571/files/android_9_samsung_s9_split_screen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6821/5716/files/risk_definition.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
🗂 Part of campaign: drsusankentarce.com 5 samples

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26971 5380 bytes
SHA-256: 6fdc3c2e19f70199a3dc5be23b70c142a68873797094129852352ce3af9353d1
font_01_sfnt_off00027bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27BCB 10984 bytes
SHA-256: 2d1dff8d31ff52881a82ef8436a39817d6cd2304df1bb70870d8dec2cbc3b179
font_02_sfnt_off0002a113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A113 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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