Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ff1c903f8eacb6…

MALICIOUS

PDF

43.4 KB Created: 2020-09-02 21:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ece0f3f749c5a7f04e5db453cbc01823 SHA-1: 84b2380f4f054951892df8b074c75ad72dd1ed4c SHA-256: f7ff1c903f8eacb68cc0983daae81e07ad8a96fd302fb2c974aded11d2fc8959
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically targeting searches for 'best gamecenter for android'. The primary malicious URL identified is ttraff.cc, which is flagged as a malicious redirector. The ML classifier strongly indicates maliciousness, and the PDF structure suggests an attempt to obfuscate or disguise the malicious intent through a large number of embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=best+gamecenter+for+android
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/bunonenavolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/lelib.pdf
    • https://cdn.shopify.com/s/files/1/0434/3863/7208/files/52916787638.pdf
    • https://static.usrfiles.com/ugd/008e52_5b8df5c5a499474989f1596227e784d5.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/capture_one_9._3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/clases_de_piano_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0461/9527/7974/files/hipoplasia_y_agenesia_del_cuerpo_calloso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.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_off00005ce2.bin
0a2ac0b2143c4c88e253290ae7066d758eaf321468fc090df289df4e9fa095be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE2 5148 bytes
font_01_sfnt_off00006e42.bin
1d53d707c80a6e2c889d666eb35c95635f13b7932346ac2504b7d764ffe959ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E42 10976 bytes
font_02_sfnt_off00009334.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9334 4324 bytes

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