Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c66f347bdae98c2…

MALICIOUS

PDF

63.6 KB Created: 2020-08-11 21:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85ec7b2938f69708f481ef1baa4c22e8 SHA-1: 40b18184dadb2d1efafe14ab9db8e9fde5767b48 SHA-256: 4c66f347bdae98c27f95913bd3168a8af93c2fb1d486cf4038313662abf425fc
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=applied+categorical+data+analysis+pdf', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains this URL, indicating a social engineering attempt to trick users into clicking it.

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=applied+categorical+data+analysis+pdf In PDF document text
    • http://files.burbankhigh.dance/uploads/1/3/1/4/131455337/5600292.pdfIn PDF document text
    • http://vafino.energysmartacademy.com/uploads/1/3/1/6/131606289/5367324.pdfIn PDF document text
    • http://files.horseshelpingpeople.co.nz/uploads/1/3/1/1/131164418/vamibo.pdfIn PDF document text
    • http://xareseti.carolynrim.com/uploads/1/3/0/9/130969426/gaxig.pdfIn PDF document text
    • http://files.megjordanart.com/uploads/1/3/0/8/130874058/1380999.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/1/0428/9835/8432/files/99237037604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/rimidutixexalize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5362/8062/files/xubasolukag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/gotofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/90235763288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6769/5523/files/kogejusaparu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lobusine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56070096689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/644203674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/31724898310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/convert_flv_to_mp3.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
🗂 Part of campaign: adcoblue.com 6 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7D 5204 bytes
SHA-256: 14f31bba7fec001793d0f890a7f515f990c6fe285ca97f4a8e8084e97d1e985b
font_01_sfnt_off0000bf3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3C 10532 bytes
SHA-256: 9732d22c4dd0060578200936e47de7c9fc32d292f022fa16d50e316b3e36c783
font_02_sfnt_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71