Malicious PDF — malware analysis report

Static analysis result for SHA-256 acae58996f1fe1bd…

MALICIOUS

PDF

52.3 KB Created: 2020-08-02 07:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31a56e598888eb22db3b3465cb591160 SHA-1: e151e06ab6bf185a8cc8360d92999a00dd609b06 SHA-256: acae58996f1fe1bd09a54b819be37b0c93e2a1471da1d497f02c012890d2ddeb
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=asd+3s142+download', suggesting a lure for users to click and be redirected. The ML classifier strongly supports the malicious nature of this PDF.

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=asd+3s142+download In PDF document text
    • http://files.design-disability.org/uploads/1/3/1/8/131871670/9101526.pdfIn PDF document text
    • http://files.brandywineseptic.com/uploads/1/3/0/7/130775063/9ea4b0.pdfIn PDF document text
    • http://files.beliefne.net/uploads/1/3/2/6/132695566/movubuvex.pdfIn PDF document text
    • http://files.tnrnewspaper.com/uploads/1/3/0/7/130740062/12df154617a.pdfIn PDF document text
    • http://files.ideltoro.us/uploads/1/3/0/8/130814390/tomuxexi_mofipawakuvom.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/1/0430/5072/9634/files/fawedikexofakezipomujefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/widupokilufisolusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/82120694034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6794/6648/files/9286384126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/nejixokasanimagoloralafot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/ronetutewuguxivonugopiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0318/2231/files/86316947504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/95452998652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/geology_labs_online_virtual_river_discharge_answers.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_off0000856e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856E 5240 bytes
SHA-256: 3602723b941b0329b2fe275f80b1ccbf081c762788c3f30efda17fb29104d35b
font_01_sfnt_off0000976f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976F 14356 bytes
SHA-256: 4ce454069b6969d9970a867080f69ec6efc9746de6e5db2e22572ac82fc47a92

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