Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf1198fa55a23d5…

MALICIOUS

PDF

46.5 KB Created: 2020-08-11 23:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 49ab5e0bc22d1a0e50a34bd4e29117d2 SHA-1: 4b4f25c606e3101452366de0e678a1cafac75041 SHA-256: cbf1198fa55a23d565770806bd832a1d7fed7a198c20ce8df9a48db0d0828f15
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though partially corrupted, contains text related to medical conditions and the tool used to generate the PDF, suggesting a lure to disguise the malicious intent of the embedded links.

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.cc/pify?keyword=diferencia+entre+angina+estable+e+inestable+pdf In PDF document text
    • http://fuvevubab.16burdens.com/uploads/1/3/0/7/130739267/jadafu_sorutaz_vaziturik.pdfIn PDF document text
    • http://files.ymov2010.org/uploads/1/3/1/4/131438899/8524642.pdfIn PDF document text
    • http://files.computerdispatch.net/uploads/1/3/1/4/131409677/fotaxaridix.pdfIn PDF document text
    • http://files.tristaricelandics.com/uploads/1/3/1/4/131453618/713540.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0436/1030/8765/files/inkscape_convert_to_svg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/pom_xml_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/ncert_class_12_biology_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16216600544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/gosijik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/83825169559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/nowimibutixomoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/49942024855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/wuronukarit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/rudinemerunubog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/makewozemovozovafoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/44346953222.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_off00006b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B12 1604 bytes
SHA-256: 192e9d533813016a4e0c1bdb71cadcb8b9c4887b6438c1ff1c773a8132389105
font_01_sfnt_off00007336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7336 5464 bytes
SHA-256: 21650c0c7242927f33ee908c42a16d79fb6510c4a9633b7d902d7006d63ea2d2
font_02_sfnt_off000085d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 11276 bytes
SHA-256: 8faedad843f54559e792d737cee54ee6d3fa6d3a593156900bdbfb5ed4a4c0e4