Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cfa600578ed298…

MALICIOUS

PDF

58.6 KB Created: 2020-08-15 05:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 979f77ce4f94df43f1f264ef62205ee1 SHA-1: cd7bcbe1070539f48d87e1d76de410e834180a4d SHA-256: 41cfa600578ed2983eaa096a75ede8f7ab72f5ac28a4d8a9c6bbdf12354b08f9
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, many hosted on 'cdn.shopify.com'. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect 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.com/pify?keyword=fraction+worksheets+adding+and+subtracting In PDF document text
    • http://files.rojasirvin.com/uploads/1/3/1/3/131382274/dulax_xojabezoz.pdfIn PDF document text
    • http://files.empowerugandanow.com/uploads/1/3/1/6/131606025/8063821.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/1/0434/2949/4936/files/cg_bhuiyan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/introduction_to_genetics_and_evolution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/23003022418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/zizaboweletatixopuxewebum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/jilumago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/jefazogakabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5041/6793/files/minecraft_fnaf_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6566/1845/files/descargar_libro_apicultura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9232/9116/files/83448241442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/dodoruvi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8631 5300 bytes
SHA-256: 9337857e44a4fe7a4fd863841c47d5621ad4a9484ab29c104d682875d375c5b2
font_01_sfnt_off00009835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9835 9712 bytes
SHA-256: 0368240da0b71a88d89960aceaa4e8ab8b496c4960795b3063fd4fb2b9918407
font_02_sfnt_off0000b9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B6 16116 bytes
SHA-256: 64e13322576ebe4b9a20b8efdba1cb2c8bc01163a7c4e1ba1f667a2d7cf8e6df
font_03_sfnt_off0000ce8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34