Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e5e7c9d74bbbd3…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 09:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 63fd23a5263c3f0242f09f45114b3285 SHA-1: f0d6c9577e31ce5a8436691404e4a0d9693161c4 SHA-256: 53e5e7c9d74bbbd386e3c0872fb2acc33ffb8d86c1d172c00022214a7859f636
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=formal+letter+to+a+couple', which is designed to redirect users to potentially harmful content. Another heuristic indicates a large number of external PDF links, suggesting a link farm or SEO poisoning attempt, with 'https://cdn.shopify.com/s/files/1/0430/0364/2007/files/wawutas.pdf' being one of the first identified. The document body contains garbled text but includes the malicious URL, reinforcing its role as a lure.

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=formal+letter+to+a+couple In PDF document text
    • http://files.ciprianoclassic.com/uploads/1/3/0/7/130775023/fufawugejijaxofa.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/1/0430/0364/2007/files/wawutas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1440/3742/files/2061872954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/51189386949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/66697206238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/72819622732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9179/5875/files/reverse_an_integer_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/netaradadimonubadefixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/the_oxford_handbook_of_functional_data_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/kiwafudebitifovobapug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/telugu_devotional_books_free_download.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 3

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_off000060be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 4584 bytes
SHA-256: 84b32dc75dc2fb8c7e566c2cb4da99dad6abbbdf286a71b405652ee22a14ba7b
font_01_sfnt_off00007050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7050 9840 bytes
SHA-256: 92a7d633d1eec780d1c7f2c3f85220f75fabc5cf3b2896a14eb718998229930f
font_02_sfnt_off000091fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91FD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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