Malicious PDF — malware analysis report

Static analysis result for SHA-256 8473a34cf171c25d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-23 13:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d133c03269b78d9911eaeaf6da300f2 SHA-1: ef15aba409414f75b1ad5ca26ce6afcaf47332b2 SHA-256: 8473a34cf171c25de1a9215c95c3b31ca7a6ad7fe1da5415b3d08d8e7d5e519e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to redirectors and SEO link farms, indicating a malicious intent to drive traffic to potentially harmful sites. The primary redirector URL is 'https://ttraff.com/pify?keyword=bhima+koregaon+history+in+marathi+language+pdf', which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. The ML classifier strongly supports the malicious verdict.

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=bhima+koregaon+history+in+marathi+language+pdf In PDF document text
    • http://palaja.newqueervisions.com/uploads/1/3/1/4/131411806/kepinake.pdfIn PDF document text
    • http://kudoj.theveggietaste.com/uploads/1/3/0/8/130874493/mikowitaza.pdfIn PDF document text
    • http://files.mikenoffkemasonry.ca/uploads/1/3/0/7/130739831/1eab9fa835e5.pdfIn PDF document text
    • http://files.ashleyhainesphotography.com/uploads/1/3/1/8/131871625/d63a4.pdfIn PDF document text
    • http://files.vermontmantel.com/uploads/1/3/0/7/130776444/pipisemarukixer.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/1/0430/1537/2949/files/jimenuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1351/3889/files/botines_plataforma_negras_mujer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/basibizomaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/castle_crashers_industrial_castle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/85152242762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/free_credit_report_once_a_year_government.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/fepifixewosamaxulis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/10259051397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3446/7752/files/lagetesijalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/55635271165.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A21 5552 bytes
SHA-256: 18af155b21b5bc039fa399b7cc06983f337de094e6ca40b24cb8ca7f6fe3296e
font_01_sfnt_off00006cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDF 9772 bytes
SHA-256: 0d4e21f8fc1ac219b2ac1f61be776dcb11afb712c0fb11e25cc542fae1dd2d16
font_02_sfnt_off00008e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E46 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3