Malicious PDF — malware analysis report

Static analysis result for SHA-256 225a2256e5a8f41b…

MALICIOUS

PDF

54.6 KB Created: 2020-08-24 02:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 823decd1d94034d4b141566de56f19c5 SHA-1: f344e1aa6b38c76a6509900fc652569abeb00db6 SHA-256: 225a2256e5a8f41b857e7750b27602a2a07c2dd67441a1f6c5aa418418f29757
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 a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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.ru/pify?keyword=aldehydes+and+ketones+and+carboxylic+acids+pdf In PDF document text
    • http://files.suitorsfarm.com/uploads/1/3/1/4/131453215/jojazurafozizur_jalazidol.pdfIn PDF document text
    • http://files.cmc-info.net/uploads/1/3/1/8/131871651/soxomi-jifad-sabote-nirewemiketamo.pdfIn PDF document text
    • http://rusaxup.baldwinhillselementaryschool.com/uploads/1/3/0/9/130969754/a3864a3b2ef8b98.pdfIn 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/1/0436/4828/6880/files/mumesetitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5277/7128/files/zozoritusegitowobifazaleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/16229451478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/buffer_overflow_attacks_detect_exploit_prevent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/nowujimaretupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/nosipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/los_actos_humanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0753/1414/files/rosenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/45885863757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/64727292428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/kufisazarofoxirip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/fuwupowaxixomef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/74606793573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/bavotibarobiba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C4 5604 bytes
SHA-256: 775d43ee3d04b0e166adbe43c5025760b92164ade8dac0442317fd2794389d8f
font_01_sfnt_off000093cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CD 10660 bytes
SHA-256: 0f59cab71c4a10cc88b33d6625c2ab7bc0006ad9ad35c61de4117c552a3f7bd6
font_02_sfnt_off0000b84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB84B 16080 bytes
SHA-256: 014fdb7076ebfc326e48e50914f0077be73d9a972b327c9fef30e9d59f054234