Malicious PDF — malware analysis report

Static analysis result for SHA-256 071a536474c8f510…

MALICIOUS

PDF

50.1 KB Created: 2020-08-12 08:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6c71a1b72a012b22f55bf9f793e7a9df SHA-1: 25288cae91fd7eaa4086dbb2712ce3dded89f2f5 SHA-256: 071a536474c8f5102406628d3b08c35c6d4c26751a01803a82194a8f92955ca7
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a primary redirector identified at 'https://ttraff.com/pify?keyword=ejercicios+silaba+tonica+y+atona+pdf'. This suggests a link farm or phishing lure designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

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=ejercicios+silaba+tonica+y+atona+pdf In PDF document text
    • http://gexedesov.amerawan.com/uploads/1/3/1/6/131637016/zalowo-gerolimo-jilakusiz.pdfIn PDF document text
    • http://files.huntersvillepres.org/uploads/1/3/1/8/131857390/purumebusofog.pdfIn PDF document text
    • http://vawum.destinationlifecoaching.com/uploads/1/3/1/4/131482993/e3410fdc5.pdfIn PDF document text
    • http://files.eatyourheartoutsd.com/uploads/1/3/0/8/130874284/wejunifomi.pdfIn PDF document text
    • http://files.euroshock-study.eu/uploads/1/3/1/4/131437924/d99307a43654.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/1/0428/2449/9367/files/93936966670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/introduction_to_operations_research_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8380/9447/files/68766872888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zilifevuzumojewod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/guzitipisemagilapizib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/lolaruze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xamunodobesezuwenetubaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/98060317364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/batunezuvabawiwoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/jaluzuf.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_off00005899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5899 5212 bytes
SHA-256: cff359118f7a263017e89a9216c252e6214d4d75c20940ad27d121434a5e2b5a
font_01_sfnt_off00006a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A61 14408 bytes
SHA-256: b935ac94061bd5fdc2471302c01b6391bf762c86ed6fc9db52c25eceb8108f60
font_02_sfnt_off000095b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B5 16316 bytes
SHA-256: f4e0a33b594647fbb296a322b9250dce1064f7d1d5fdf1b61004eb46530ca58b
font_03_sfnt_off0000ab43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB43 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71