Malicious PDF — malware analysis report

Static analysis result for SHA-256 3737ee37764d1722…

MALICIOUS

PDF

50.7 KB Created: 2020-08-07 21:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4685b9548a6f9b97496f94b323376df6 SHA-1: e331d52dd4c544084bf41c64e26a3b1add227a75 SHA-256: 3737ee37764d172224438885b60962f7956fffaf70d5bfc9b3f1a1216ca7ecb9
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=biographies+for+2nd+graders+pdf'. This suggests the document is designed to lure users to malicious sites under the guise of providing PDF content. 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.ru/pify?keyword=biographies+for+2nd+graders+pdf In PDF document text
    • http://wolare.economiczhang.com/uploads/1/3/0/7/130739415/vepudikexizis-durukuxewituteg.pdfIn PDF document text
    • http://files.goodshepherdbarrevt.org/uploads/1/3/2/6/132695493/gulidavitefitezi.pdfIn PDF document text
    • http://files.nickgatesart.com/uploads/1/3/1/3/131398008/fa12b0100.pdfIn PDF document text
    • http://files.joannacookeart.com/uploads/1/3/2/6/132682768/nisivuxisimefas.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/1/0434/4568/2328/files/65419600175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/bepubapuxuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/bojezoxoxas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6175/5560/files/32192900095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/mitama_battle_cats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/wevowulobazewevevesiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3806/4296/files/control_de_bemisia_tabaci.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/gurivawepamixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5289/1298/files/83078171431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/reverse_array_python.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE3 5160 bytes
SHA-256: 6dc74cec213a1c1eee8bc63516b2cda58cba3b0676b8518918cd6bcb8d929bcb
font_01_sfnt_off00007e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E60 16076 bytes
SHA-256: b0b4cf353593777adaac5bd14af139bc289a4334820bb416517949a7b1811b7f
font_02_sfnt_off0000b012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB012 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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