Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9cf5533fd319c4d…

MALICIOUS

PDF

55.4 KB Created: 2020-08-03 01:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee292cd881a3427769f8c9172e3184b4 SHA-1: aade35091ffbe95faf549999b62005a4356870e4 SHA-256: b9cf5533fd319c4d6fbd4952e94f34b3e42d41e210331b415fc8cab23f1e2bb5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, identified as a link farm, with a primary redirector pointing to ttraff.com. This infrastructure is known for distributing malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to lure users to external, potentially harmful, resources.

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=fable+2+archaeologist In PDF document text
    • http://ravuvimek.elkgroveketocorner.com/uploads/1/3/0/7/130776031/refofa.pdfIn PDF document text
    • http://files.gavanw.com/uploads/1/3/0/8/130874213/a716ca8.pdfIn PDF document text
    • http://files.shademotorkits.com/uploads/1/3/1/3/131379740/26307ffd900608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/9541767214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/61956716138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/rojoxanuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/10911506315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/pdf_to_svg_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/5957067880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/tetexabujufogobemag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/50476222231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7922/7805/files/62182703147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/sepenuzizoso.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
🗂 Part of campaign: millworksart.com 3 samples

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D88 4972 bytes
SHA-256: d784d0f3fcb4a0477fb5743802e0d868b76e2578d73c7e379a702bf5bc7030e2
font_01_sfnt_off00009e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E80 10636 bytes
SHA-256: ae994ca8754c21b6cca2308c0fc6e2c1d26f7c1fe3cdf1f9efe9397ab985ef20
font_02_sfnt_off0000c2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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