Malicious PDF — malware analysis report

Static analysis result for SHA-256 781061e9fdde5d39…

MALICIOUS

PDF

41.0 KB Created: 2020-07-31 21:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8af311b5d08c2e4c54ccd4cb61d3294 SHA-1: 34cc894bc568ba22fae46aaef1bc9ce0505bceca SHA-256: 781061e9fdde5d39493934ce4ad4c306f88c82cae74bdfe97edea045d995b01f
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to a redirector service, indicating a link farm designed to distribute malicious content or phish users. The presence of a known malicious redirector URL and the ML classifier's high confidence score further support this assessment. The document body text, though garbled, contains the malicious redirector URL, suggesting an attempt to disguise the malicious link.

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.cc/pify?keyword=js+socket+room In PDF document text
    • http://files.greaterheightsfellowship.org/uploads/1/3/1/6/131636737/3945625.pdfIn PDF document text
    • http://files.newbeginningsequinestables.com/uploads/1/3/0/9/130969300/jawadixavebejab-pizuri-zapotak.pdfIn PDF document text
    • http://files.drachenspiel.ca/uploads/1/3/1/4/131413678/c0c347ac8051923.pdfIn PDF document text
    • http://files.gransstaystrong.com/uploads/1/3/0/8/130874593/98b40a.pdfIn PDF document text
    • http://files.customizedtriptofrance.com/uploads/1/3/0/7/130776406/3234898.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/1/0435/4772/1892/files/nixiseponupemibitunakukuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/vofesigon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5358/8390/files/91098503059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/22219587910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/59789690443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2582/3904/files/20090259012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/75223870304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/lavizusidujabanoduwol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/83485092509.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 5

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_off00005ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA9 4756 bytes
SHA-256: f137a2d675b9402104f70c133f1d2b29038f28cf1e15051dcb2437d3d514535a
font_01_sfnt_off00006ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC6 13152 bytes
SHA-256: 125b33ec6d04230d24768728d41115c395bf15953a0ac2bc7d1be44cab191db8

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