Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3f8dd4aac6f58d…

MALICIOUS

PDF

47.4 KB Created: 2020-07-24 07:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1fc391293d595c6e1d13b3d25b780d77 SHA-1: b6f59d2d6bf6d740eaa15c4299cdebbeb253c555 SHA-256: bf3f8dd4aac6f58d720b7fe0db16697bbd374f64792b28f91949f4aa7281ad9a
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identified this as a PDF link farm. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL identified is ttraff.com, which appears to be used for redirecting users to potentially harmful content.

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.com/pify?keyword=math-+drills.+com+dilations%2528+d+answers In PDF document text
    • http://files.manuscriptcritiqueservices.com/uploads/1/3/2/8/132815220/0c7a720.pdfIn PDF document text
    • http://files.kapipes.gr/uploads/1/3/1/0/131070469/884cec.pdfIn PDF document text
    • http://files.apg-ga.com/uploads/1/3/1/8/131856713/2406173.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/1/0434/4135/6950/files/31166825391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/pipivomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/tadepikeziwakuvokapinige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/vixusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/11588559924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/pudefidudapar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2210/4222/files/bibemadoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/gilipajijizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6405/7238/files/gezeteriwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/nolemexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/51792293752.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_off00007d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2D 5208 bytes
SHA-256: a508ac386d854ac7f445ace4cd4bb477e8169f8f8a9faaec99c73c9dd8d02d50
font_01_sfnt_off00008ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED9 9876 bytes
SHA-256: c7e09757fe95bce592d61ad5b0ccaaec90e5b75fe256fd04455b40a77abafdf3

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