Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f3725be285c86b…

MALICIOUS

PDF

46.5 KB Created: 2020-08-08 14:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef05f41f5ba50390b027bdd268b3f714 SHA-1: 7c8ffcf90288d81389475e7cb828f3e1a3159477 SHA-256: a3f3725be285c86b3443ba92e5abc121098e5fe83684e8eb39a0324c1ba4e6b9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/wb?keyword=partes%20de%20un%20aerogenerador%20y%20sus%20funciones%20pdf. This suggests the document's purpose is to lure users into clicking malicious links, likely for phishing or malware delivery. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=partes%20de%20un%20aerogenerador%20y%20sus%20funciones%20pdf
    • http://files.thelostvalleyobservatory.com/uploads/1/3/2/6/132695216/8837605.pdf
    • http://wewunopuv.monarchglassstudio.com/uploads/1/3/1/6/131607600/3889329.pdf
    • http://files.marsconstructioncompany.com/uploads/1/3/0/7/130738801/b0c65bf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2187/6899/files/48190325006.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/batovasiwibifabunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/pukafuditirupu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0397/files/possessivpronomen_arbeitsblatt.pdf
    • https://cdn.shopify.com/s/files/1/0431/3035/5866/files/duvuwigorelademolurakedu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/isagenix_products.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/kowaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/rakegojis.pdf
    • https://cdn.shopify.com/s/files/1/0439/9867/5102/files/treble_clef_notes_worksheet.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_off00006698.bin
46e3c78eb9fe3a12b9ec1508c98955dd4a27ce59d58db9c1fd65f4e6d33766c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6698 5276 bytes
font_01_sfnt_off0000789e.bin
f20a7c25098086a1d8207fa6f4b37b029b72a6e67a2760d940efa147c581ec28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789E 11136 bytes
font_02_sfnt_off00009cd7.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD7 4324 bytes

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