Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18a975768d4461a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-19 23:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 434e42a8aa5e31598e807892db64f9ee SHA-1: 0c7025bd42a67d3c67c969b9071bcb787dde19d6 SHA-256: c18a975768d4461aaee275833c75afd776cc0faadc9dae31c1ec1358c30f598a
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=yelp+fact+sheet+yelp', which is flagged as malicious. The presence of numerous external PDF links, as indicated by 'PDF_SEO_LINK_FARM', further supports the malicious intent of directing 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.ru/pify?keyword=yelp+fact+sheet+yelp In PDF document text
    • http://kanujit.no16cyclecaps.com/uploads/1/3/2/7/132712109/mobugoware_japeberedo_voxelutudiz.pdfIn PDF document text
    • http://files.grayduckwatches.com/uploads/1/3/1/4/131438067/ruxafawomana.pdfIn PDF document text
    • http://files.rexforddrive.com/uploads/1/3/0/8/130813732/d93f701ec22.pdfIn PDF document text
    • http://files.lumacomi-observatory.com/uploads/1/3/0/7/130776268/gevozoras-kexif-difowuxagomuk-juraxekofu.pdfIn PDF document text
    • http://files.wisdomrecoverycounseling.com/uploads/1/3/1/4/131407227/2101776.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/1/0429/2732/5343/files/44292907310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/xezexupawimusukidosox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/bakudubafezifopuxusub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4726/3128/files/50264988801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/gujuvuxupoguduwatulevarop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3069/1491/files/anemia_defisiensi_besi_anak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5389/1232/files/lightroom_key_gen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/kemanotakuvegukotuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/tepogenebeteworubajug.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_off00006c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0B 5072 bytes
SHA-256: 4ba45b31eba941f6727e00c9c98e508b6d2621b6b169861923e97ec9ce6e5917
font_01_sfnt_off00007d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D50 10116 bytes
SHA-256: 6dc3fe7e123837e36a0ba7d480cc8573dda6b9bc9b94605925ef7e3653d1beb3

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