Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1d9abe6c94c4db…

MALICIOUS

PDF

154.7 KB Created: 2020-07-31 11:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9ae24ea15ae9e72b39aa23fe00a25f0 SHA-1: 4c33030f1170e08072c371cef12711336b429b4d SHA-256: 4d1d9abe6c94c4db0987632d401668641bfc58a2291b6f1f3526ea80793c2876
134 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The ML classifier also strongly flagged this PDF as malicious. The embedded URL `https://ttraff.ru/pify?keyword=active+and+passive+voice+with+answers+pdf` is the primary indicator of malicious intent, likely serving as a lure to a phishing site or a download host. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=active+and+passive+voice+with+answers+pdf In PDF document text
    • http://files.winnparishfire.org/uploads/1/3/1/8/131872105/xaxetami.pdfIn PDF document text
    • http://files.ellsworthffa-ffalumni.com/uploads/1/3/0/7/130776130/nilogitije_mibovusumapado.pdfIn PDF document text
    • http://files.trevoultersouthdevons.com/uploads/1/3/0/8/130814208/vefejofewimupunilug.pdfIn PDF document text
    • http://files.updatescentral.com/uploads/1/3/1/3/131384018/fotimiva_nidanu_gibuvidedavade.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/1/0429/9898/8954/files/46520426181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/sirapabixituzup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/pegipepinomejibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/vosevunubebelimowofone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/77408719426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/jemoredebesilumagir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/92863605720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/85828918488.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 8

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_off000225ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x225AE 5140 bytes
SHA-256: a5e30c1c6a2b8ec9518e273dd193329bb5a41a8147c9e2fe5e59035f7fb47d3c
font_01_sfnt_off0002372d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2372D 10344 bytes
SHA-256: ad356fca1977524abfe323b6479e0441b91c769052d59a0620696c3f4db98931

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