Malicious PDF — malware analysis report

Static analysis result for SHA-256 0944a46a85ff1186…

MALICIOUS

PDF

38.4 KB Created: 2020-07-11 05:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c60da0fbde88ef3995c7d8bfbc8103e SHA-1: 19f7287233c6fc69d886b91050b4fb9f8a8b8184 SHA-256: 0944a46a85ff1186de40072bfe7172fcbb22c4a0abfc1cf22caec94e2b4bd500
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=all+name+reactions+in+organic+chemistry+class+12+cbse+pdf', is identified as a malicious redirector. The file's structure and the presence of numerous links suggest an attempt to direct users to potentially harmful content, possibly for SEO poisoning or to distribute further malware.

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.
  • ClamAV: Pdf.Dropper.Agent-9091766-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9091766-0
  • 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=all+name+reactions+in+organic+chemistry+class+12+cbse+pdf
    • http://files.introphilosophyofmind.com/uploads/1/3/1/8/131871553/4965962.pdf
    • http://files.roadrunningrules.com/uploads/1/3/0/8/130813770/semubokas_safobepo.pdf
    • http://files.keepthomascountybeautiful.org/uploads/1/3/1/3/131383383/zanikobideton-jupupa-lebux.pdf
    • http://files.burnsidecenter.com/uploads/1/3/1/1/131164272/gikagiz.pdf
    • http://files.ocsoilny.org/uploads/1/3/0/8/130874614/efe5f216.pdf
    • http://files.northerned.com/uploads/1/3/1/4/131483371/kizezi.pdf
    • http://files.danieldurchholz.com/uploads/1/3/2/3/132303007/56922016.pdf
    • http://files.unclejsweets.co.uk/uploads/1/3/1/0/131070523/a225857965a.pdf
    • http://files.mackcommunications.com/uploads/1/3/0/7/130776104/6821021.pdf
    • http://files.bikeebike.com/uploads/1/3/1/3/131384101/223556ddbaf6d4a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://mixusobaso.files.wordpress.com/2020/06/gedijax.pdf
    • https://bababepuvo.files.wordpress.com/2020/06/13596197937.pdf
    • https://jadokabise.files.wordpress.com/2020/06/gerukawujuwobarinil.pdf
    • https://lebusesu.files.wordpress.com/2020/07/figatujapozuredasod.pdf
    • https://mutemoxapeko.files.wordpress.com/2020/06/29197169662.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerivavegexem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatamukizulenekop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/vetegavekol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/felamisakawubibaxejurelok.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/58822628909.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005880.bin
25db5ed0a1db296c6406742a5bc0734d5044adf0da9c71046179ec4a96f11830
pdf-font-stream PDF embedded font (sfnt) at offset 0x5880 5772 bytes
font_01_sfnt_off00006bf8.bin
f79a99c0096f7da5ec3cd036329467f01914f794e5e9728fd41daa6a0c6fee6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 9392 bytes