Malicious PDF — malware analysis report

Static analysis result for SHA-256 3afcce0456e717d3…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 20:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc56bfd8c3ab784381632d72c7cbdae1 SHA-1: 4b37a3e972652f770c9c51cbf40b8953a00d8488 SHA-256: 3afcce0456e717d347d4688a3bcdfad00ea86dd37898a579a800bc61d1eb4d01
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a lure related to an 'Australian visa lottery application form' and embeds a link that redirects to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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.cc/pify?keyword=australian+visa+lottery+application+form
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/leludaledun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/vazigezudifa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/2522675660.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/chemistry_notes_a_level.pdf
    • https://cdn.shopify.com/s/files/1/0438/8113/6296/files/kung_fu_3._0.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/tcs_ninja_aptitude_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2386/files/mandatory_minimum_sentencing_guidelines_georgia.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/lesisodedugukoloretuse.pdf
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/army_risk_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/96651525151.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/momumepopuwegaje.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/xekagolipusa.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b27.bin
a870d47c74a0489fa9efac7ae16a575789c51df5e928abed1e776c223a4b6806
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B27 5192 bytes
font_01_sfnt_off00006cc4.bin
4081950c0ef007f39722c6e1b13970016f343f5e65b336e03696fa31f866ce59
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC4 9964 bytes
font_02_sfnt_off00008ec1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC1 4324 bytes