Malicious PDF — malware analysis report

Static analysis result for SHA-256 4381e661ac34cb8f…

MALICIOUS

PDF

40.4 KB Created: 2020-08-10 09:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9a135a74d387dc3e7014b4c55a2bc81b SHA-1: 7c1e6686b530ba43c83f168cfda70ea48d527de2 SHA-256: 4381e661ac34cb8fc1b367e7d0cb45c7cb629d433f9a5b0c7af15d1bbe133dd7
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a "cutting board color chart pdf" and a large number of other PDF links, likely for SEO manipulation. The presence of a visual download button further supports a social engineering lure. The primary malicious URL is ttraff.com, which redirects to other content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cutting+board+color+chart+pdf In PDF document text
    • http://files.peaktherapy.info/uploads/1/3/1/3/131380591/tomutedazav.pdfIn PDF document text
    • http://files.fishandswallowproductions.com/uploads/1/3/2/6/132695782/fizufidubexawamug.pdfIn PDF document text
    • http://files.windyoakes.com/uploads/1/3/1/6/131606968/zekadat_faduroxam_kuxogadasil_tomukigasonimon.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/1/0432/7686/1606/files/i_a_maron_calculus_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7222/4421/files/mosigefezobobefonebulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/nawilabovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2890/4093/files/futebijomovojesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/3d_maker_for_nx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gasowezigubufavowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/74797060561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6628/4446/files/mass_media_translation_from_english_into_arabic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/bbwc_fan_forum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/60101091539.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 4

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_off00006055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 5284 bytes
SHA-256: 5a7d01d445ee0a7b315e07a248330ef3690b8ca38ca77ef51988c5ca36991043
font_01_sfnt_off00007242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 10264 bytes
SHA-256: 3ad79fded696006a2bd055ffeba3371821ae05c8727de44023cbc4a89fc403ad

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