Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfdeff4e4064982f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 14:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94388cd7f2750f5e6a8f020f5b73d159 SHA-1: 955f0e031cfaf9ac2786276a1babe0ccd8f1efac SHA-256: bfdeff4e4064982f3810466ec106e447c797095ce5c2a7b29209ccf30cfcabce
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a title related to calculating reaction pathways, and also includes the malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content broadly.

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=reaktionsweg+nach+der+faustformel+berechnen In PDF document text
    • http://files.ralfrosskamp.com/uploads/1/3/0/7/130738675/1858742.pdfIn PDF document text
    • http://files.americasbestchildcare.com/uploads/1/3/1/8/131871692/1890124.pdfIn PDF document text
    • http://files.bigoakstables.com/uploads/1/3/0/7/130739059/zemolumo.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/1/0431/7495/3120/files/the_carter_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/nexepiven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/keten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/35322490343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6068/2139/files/distribuio_binomial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8293/0593/files/adjective_adverb_clause_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/69387462506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/bestiario_juan_jose_arreola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/16369152286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/87008323219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/roxugula.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 1

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_off000062f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F9 5736 bytes
SHA-256: 7b27b3705ffb91434bc8e8715619724805b07e39b948c9ec0668ccc60188c4e1
font_01_sfnt_off0000766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766E 14380 bytes
SHA-256: 06d6f1aae1852907c5252ad2a60c7094874e09f8edebce59a7dd7ef8078bba08

Open this report in the interactive analyzer, or submit your own file for analysis.