Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4830478c0b060f…

MALICIOUS

PDF

51.4 KB Created: 2020-08-08 09:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6a5f3057c65a44ebc203444760c53e8 SHA-1: 8ed0d20ee3f372d4f67cd8a02e3c0e74dfbcd6c2 SHA-256: 9f4830478c0b060f4fcf33f379af7faea8aef4564f44918043b9354dc5e256a0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Risen solar panels' and includes the malicious URL. The primary attack pattern involves redirecting the user to a malicious site, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of further stages.

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.com/pify?keyword=risen+solar+panels+pdf
    • http://files.pearlmintzerphotography.com/uploads/1/3/0/7/130739488/8756279.pdf
    • http://files.paulmon-global.com/uploads/1/3/1/3/131379552/zimizezozirowip.pdf
    • http://files.staylorhedgesart.com/uploads/1/3/1/3/131382274/f6f9677c44.pdf
    • http://files.evelinemariasmith.com/uploads/1/3/1/8/131856079/5170150.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/81749014376.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/xasawitaburinilurapik.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5352/files/fivom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0349/files/constant_velocity_joint_vs_universal_joint.pdf
    • https://cdn.shopify.com/s/files/1/0433/5573/4166/files/dapixewisekokizimar.pdf
    • https://cdn.shopify.com/s/files/1/0438/8916/4440/files/lapajemogagubunapur.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/wovojibesojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/alimentacion_saludable_oms.pdf
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/dijobexopeguvesawuvatowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/basic_civil_engineering_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/29663318375.pdf
    • https://cdn.shopify.com/s/files/1/0432/0968/7208/files/19405402849.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/97804681650.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/81274254674.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/nudofe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b20.bin
5dc3718a8f93b07a92eac22122c2b2f48d3489e07c9ab5c40d6036b8673d7572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B20 5040 bytes
font_01_sfnt_off00009c57.bin
21a9569328122bc0e139a1f1dde8840e931c95af9791cf1d75bd179c08ad51ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C57 10536 bytes

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