Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc733861c1ec80e…

MALICIOUS

PDF

43.6 KB Created: 2020-08-15 06:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8870f25bbed46b698e028107db4bf91 SHA-1: 2a6311ead37c8f3ee0d3b55f90977d72278dcaad SHA-256: bfc733861c1ec80ee0c6092de24fcb7ce50e2d4aef29e61bbcb7d17dff78f7a9
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector (ttraff.com). The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy, likely to improve search engine ranking for malicious content. 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.com/pify?keyword=leister+varimat+v2+manual In PDF document text
    • http://files.synergy-rhodes.com/uploads/1/3/2/6/132682822/6466026.pdfIn PDF document text
    • http://files.manorhousedesigns.co.uk/uploads/1/3/1/4/131407423/9877099.pdfIn PDF document text
    • http://nupex.drelraghy.com/uploads/1/3/1/4/131437246/loraxuzamomisofuwufe.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/1/0432/6309/9040/files/witapenewoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65233410578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4158/6332/files/39354033860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/buprenorfina_en_infusion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/cartoon_drawing_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/ffmpeg_compress_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/ejercicios_condensadores_en_serie_y_paralelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/article_writing_for_class_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4208/5783/files/mawik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3001/9237/files/berichtsheft_vorlage_mfa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/behavior_tracking_chart.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 2

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_off00006153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 4964 bytes
SHA-256: 25ef4695f20a6cac65d49a212ec8162d8bf16c1532e24aea1664ddc014909165
font_01_sfnt_off00007227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7227 15364 bytes
SHA-256: 4dabebc38e8d8a40b282b32a3bf1434c9cbb8fdd5811d42aacaae059db07f7b6

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