Malicious PDF — malware analysis report

Static analysis result for SHA-256 1863f27944cc6d51…

MALICIOUS

PDF

48.7 KB Created: 2020-07-28 07:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7347e03c7b0fbe420335e50d0b0f8b35 SHA-1: b86c6a1ff8e0b153c8e994a0542742e39c0ce905 SHA-256: 1863f27944cc6d515a26224ed031c884f47715ec26d80784c7fd45e2f553e511
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to exam dates, which is a common tactic for phishing or malware delivery. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=dbrau+agra+exam+date+sheet+2019
    • http://files.studio279fitness.com/uploads/1/3/0/9/130969576/vedofuwiteser-wazevel-jakizukokagag.pdf
    • http://files.jmbeal.com/uploads/1/3/1/4/131406391/xixarubawefa.pdf
    • http://files.learningandwriting.com/uploads/1/3/0/7/130739139/4609336.pdf
    • http://files.lola-novella.com/uploads/1/3/1/4/131453588/b9ed1fff.pdf
    • http://files.toblergymnastics.com/uploads/1/3/2/6/132696604/7359545.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/54775776601.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4274895189.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/kipozodedigelekani.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/11297301204.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/92720318805.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/kadafabeluvugepazetaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/sanilijimuzidugok.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/79993718931.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/10730606045.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/degemevazojewis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/2477665659.pdf
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/menoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/duzunafonixujipivaku.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_off00007feb.bin
0fd6d46d072bb0e475a7b0f6f3e3cf14b4a9a06438afaba3c0f11839a647155f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEB 5512 bytes
font_01_sfnt_off000092ac.bin
5932c9312f22e7b52a7da8d2a1015c15860a4a920371bb7117b258da1d2105ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92AC 10052 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.