Malicious PDF — malware analysis report

Static analysis result for SHA-256 73564bc89d325de8…

MALICIOUS

PDF

45.4 KB Created: 2020-08-29 17:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f728eb496e0baffd0e51bc3eed3fb29c SHA-1: 1c668338c670ffd68db1926d6cb54984d2ecdcfb SHA-256: 73564bc89d325de89eae201251c1117ffc8267d41341f59f4d4fcee9d536740b
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL pointing to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier strongly suggests maliciousness. The embedded URLs and the heuristic firings indicate the document is designed to redirect users to potentially harmful content, likely as part of a phishing 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.ru/wix?keyword=livre+charpente+bois In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/de60da_8a6785c549e144f38c997f8cbc58fbf4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_557042824bb64950b51f14f45456db10.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dd721f7212b0415da5a7c2f9291e5e35.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9240/1566/files/nomuwifuxenuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/hormone_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/nuniwavomewena.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c8323a88032a41128fba3159627adb88.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fa32e7286ed54b8caacc51df05390803.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b665a348b6144919aacb5c9f5cfc3fc8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a382ee_ec8b0ef1794a444f87022829904de286.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_04244193227144738393786ac1a82aa0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cd14f7741d064e7fa4c6a787b5d1c254.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f09a9d_b317809fa23447619bb1a7e2edc5043a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b51c96207ff748869eea4b0dcbe50a33.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b2c09_d8820909ef454627a6a8c22a629e60ae.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_off000053df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53DF 5132 bytes
SHA-256: bbbfab4628fc9311453807447c26d58c5b8c24ed5b7e689e5657b8312af0bdb0
font_01_sfnt_off0000653f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653F 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00006dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 11208 bytes
SHA-256: 5f9c3e668e4af5ebc03f94dd2c796ad722542eeda64faa2f93f9750bc0477fe2
font_03_sfnt_off00009151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9151 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939