Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df881e36fd9e728…

MALICIOUS

PDF

41.0 KB Created: 2020-08-11 19:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f10f8ab3c2372d32dc1bedd6bf00e726 SHA-1: 858b617683f218b47b5dccca7e18fa97da9eee9c SHA-256: 3df881e36fd9e7286d4234a18cbd5494f4cd08c5db5605bb1f9ecba9823bd2c1
202 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs, including the malicious redirector. This suggests the primary purpose is to lure the user into clicking a link that leads to malicious content or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=andhra+pradesh+bhoodan+and+gramdan+act+1965+pdf In PDF document text
    • http://files.millpro.org/uploads/1/3/0/7/130776065/cba3e3e.pdfIn PDF document text
    • http://files.sherrardtigerstv.com/uploads/1/3/1/3/131384301/zalakol.pdfIn PDF document text
    • http://govizi.tmeansphotography.com/uploads/1/3/1/8/131856772/2510891.pdfIn PDF document text
    • http://zumulev.unitethevillage.org/uploads/1/3/0/7/130739835/xeragonaxariw.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/1/0433/7513/2824/files/71723271143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/66268359779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2370/3970/files/65752947777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/jesus_bleibet_meine_freude_violin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/xirelekasumuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/bank_note_press_dewas_question_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31931154882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/android_attendance_system_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/gebavibirafez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/xajudajematu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/xejowifenubuxujoxuxes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1482/7677/files/xbox_button_layout.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: alexisortizart.com 4 samples

Related samples 3

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Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000602d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602D 6152 bytes
SHA-256: 55bef54116bb59fd368abbf3fa6b48e3fb9a1331333fa66b608a53b5ad054619
font_01_sfnt_off000074e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E6 9920 bytes
SHA-256: af0242e363c7efcc086d6f54fe3c9c4de9e75416a128d1cbeb482709cf6c9fa3

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