Malicious PDF — malware analysis report

Static analysis result for SHA-256 818614d4813dfc68…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 02:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86f7507f7cce62ce4dad8dc38a00caea SHA-1: 3f96900bb064e7e2eac14fa698c29463bfe85f80 SHA-256: 818614d4813dfc68aed12d1c08ee79200933cce7ca2abe63875aba6f398ec507
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing indicating they lead to known malicious redirector infrastructure. One such URL is https://ttraff.ru/pify?keyword=vbscript+date+format+dd+mm+yy. The document body, though heavily obfuscated, contains references to 'vbscript' and a URL that aligns with the malicious redirector. This suggests a phishing or malware distribution attempt via a link farm.

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=vbscript+date+format+dd+mm+yy In PDF document text
    • http://files.luskccmaths.com/uploads/1/3/1/3/131379833/zikinitewatizoj_xitukok_xijuvitatu_joxut.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/1/0432/3573/7755/files/adobe_reader_to_word_converter_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/vegeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/fumexafegixijilal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/fepokibuzabiwadozip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/86242662198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3778/4224/files/e46_bentley_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/68962050877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/cluster_computing_abstract.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/pikipasuxubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/74927405186.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D3 5476 bytes
SHA-256: f14e65268699c11a1fa7206a35364bfb734230370f25ac4474c564cd96830c90
font_01_sfnt_off00006b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B59 15168 bytes
SHA-256: 8aefebb5ac84bbaa9377aec01692f74c218aa80e8c2c5b799881fdce69491c70

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